Checked against primary sources 2026-08-24

The business name goes on the door as well, not just the license number

These are small rules with specific numbers in them, which makes them easy to enforce and easy to fail. The two pieces most often left off are the business name and the advertising conditions that come attached to the exemptions.

What goes on the vehicle

Two items, not one. Tex. Occ. Code 1305.166(a) names the contractor's business name alongside the license number, so a door carrying TECL and a number and nothing else has done half the job.

The physical specification sits in the subsection under it. Letters and numbers at least two inches high, in a color that contrasts with the color of the background surface, permanently affixed in conspicuous places on both sides of the vehicle (Tex. Occ. Code 1305.166(b)).

16 TAC 73.51(d) restates the duty in the department's own words and adds the part the statute never mentions, which is the three-letter prefix that goes in front of the number.

Permanently affixed is the phrase to notice, because TDLR carries a separate enforcement line for failing to permanently affix the name and number in a conspicuous place on both sides, cited to Tex. Occ. Code 1305.166(b)(2). It is a violation in its own right, scored separately from getting the letter height wrong.

Which vehicles, and whose

The statute and the rule describe different fleets, and the rule describes the bigger one.

Tex. Occ. Code 1305.166(a) attaches the duty to each vehicle owned by the contractor. 16 TAC 73.51(d) attaches it to each vehicle owned or operated by the business and used in the conduct of electrical work.

Two things fall out of that difference. Operated is wider than owned, so a leased van or a rented truck the business runs is inside the rule even though the statutory sentence on its own would not obviously reach it. And used in the conduct of electrical work is a limit, so a vehicle the business owns that never goes near a job is outside the rule.

The sign contractor and appliance installer versions are built the same way around their own kind of work. 16 TAC 73.54(c) reads used in the conduct of residential appliance installation work.

Where the two instruments pull against each other, that is a question for the department or a lawyer rather than for a website. What is not in doubt is the ordinary case: a truck the business owns and sends to electrical jobs is covered by both, twice over.

The prefix, and the subsection map that goes with it

TECL is not the Texas prefix. It is the electrical contractor prefix, and there are three of them, each living in its own contractor responsibilities section.

Read the third row across. The appliance installation section starts its vehicle provision at (c) rather than (d), so every provision after it sits one letter earlier than its equivalent in the other two sections. The invoice rule that is 73.51(f) for an electrical contractor is 73.54(e) for a residential appliance installation contractor.

That is worth more than pedantry. Reasoning across from the electrical contractor section and keeping the letter is how a citation ends up pointing at the wrong provision in a response to the department.

Put the wrong three letters on the door and the license number is right and the marking is still wrong.

The advertising rule, and the strings on its exemptions

Name and license number, in everything designed to solicit the business. 16 TAC 73.51(e) says in terms that this includes business cards.

Six kinds of advertising are released from carrying the number, and two of the six are narrower than the summaries you will see quoted.

• Nationally placed television advertising, but only where a statement that license numbers are available upon request is used in place of the number. Drop the statement and the exemption goes with it.
• Telephone book listings that contain only the name, address and telephone number.
• Manufacturers' and distributor's telephone book trade ads identifying an electrical contractor. Telephone book is part of the exception rather than scenery, so an ordinary trade ad somewhere else is not covered by it.
• Telephone solicitations, provided the solicitor states that the contractor complies with the licensing requirements of the state. The number still goes out on request.
• Promotional items of nominal value, the rule naming ball caps, tee shirts and other gifts.
• Signs located at the contractor's permanent business location.

An earlier version of this page got two of those wrong in the same direction, by dropping the condition and keeping the exemption. It described the telephone book listing as name only, which is narrower than the rule, and the television carve-out as unconditional, which is wider than it. Both are corrected above.

Proposals, invoices and written contracts are a separate provision and a stricter one. Under 16 TAC 73.51(f) they carry the contractor's name, address, phone number and license number, and then a second, prescribed block that names the department, its Austin mailing address, two telephone numbers and its website. The rule sets out that block word for word, so copy it out of the rule rather than writing your own version of it.

The honesty rule, whose two halves are not treated alike

16 TAC 73.70(g) reaches a licensed contractor's advertising twice over: advertising that is false, misleading or deceptive, and advertising that does not clearly display the licensee's state license number.

Clearly display is doing work in that sentence. A license number in four point gray at the bottom of a flyer is displayed. Whether it is clearly displayed is a judgment somebody else gets to make.

The department does not treat the two halves as equivalent. A missing name and number sits in the lowest penalty class on its enforcement plan. False, misleading or deceptive advertising sits two classes above it, with a suspension attached.

What it costs when the department finds it

TDLR publishes an enforcement plan for the electricians program that puts a penalty class against each violation, and every vehicle marking line in it sits in Class A, a fine of $500 to $2,000.

There are three of those lines, and one badly marked truck can attract all three at once.

• Failing to display the business name and contractor license number on a vehicle used in the conduct of electrical work, cited to Tex. Occ. Code 1305.166(a) with 16 TAC 73.51(d), 16 TAC 73.52(d) and 16 TAC 73.54(c).
• Failing to display them in characters at least two inches high and in a color that contrasts with the background, cited to Tex. Occ. Code 1305.166(b)(1) with the same three rules.
• Failing to permanently affix them in a conspicuous place on both sides, cited to Tex. Occ. Code 1305.166(b)(2).

Advertising without the contractor name and license number is Class A as well, and so is leaving the required information off proposals, invoices and written contracts. Advertising that was false, misleading or deceptive is Class C, a fine of $2,000 to $5,000 plus one year of probated suspension up to revocation.

The plan is the department's own schedule rather than a ceiling. The ceiling is statutory, and an administrative penalty may not exceed $5,000 per day for each violation, with each day a violation continues or occurs counting as a separate violation (Tex. Occ. Code 51.302).

Who this binds

These are contractor obligations. 16 TAC 73.70(a) routes an individual licensee's work through a licensed contractor or an employing governmental entity, and the marking and advertising duties sit with the contractor license rather than with the person holding the wire.

So if you are an individual licensee driving your own truck and not contracting, you are not the person these provisions are aimed at. If you are advertising for work, you probably are.

One direction left to check. Everything above is quoted from 16 TAC 73.51, which is the electrical contractor section. If your license is a sign or appliance installation contractor license, find your own row in the table above and read that section instead, because parallel does not mean identical.

What this page cites

• Tex. Occ. Code 1305.166 Display of license. Subsection (a) requires the contractor's business name and the license number on each vehicle owned by the contractor. Subsection (b) sets two inch lettering, contrasting color and permanent affixing in conspicuous places on both sides. No subsection (c), and no exemption in the section. source
• 16 TAC 73.51 Electrical contractor responsibilities. The TECL prefix and the vehicle duty at (d), covering each vehicle owned or operated by the business and used in the conduct of electrical work. Advertising and its six carve-outs at (e). Proposals, invoices and written contracts at (f). source
• 16 TAC 73.52 Electrical sign contractor responsibilities. TSCL prefix and vehicle duty at (d), advertising at (e), proposals and invoices at (f). source
• 16 TAC 73.54 Residential appliance installation contractor responsibilities. TICL prefix and vehicle duty at (c), advertising at (d), proposals and invoices at (e). The letters run one earlier than in the other two sections. source
• 16 TAC 73.70 Standards of conduct. Subsection (a) routes an individual licensee's work through a licensed contractor or an employing governmental entity. Subsection (g) covers advertising that is false, misleading or deceptive, or that does not clearly display the license number. source
• TDLR, Electricians Penalties and Sanctions The department's enforcement plan for the program. Class A is a fine of $500 to $2,000 and holds all three vehicle marking lines, the advertising line for a missing name and number, and both proposal and invoice lines. Class C is $2,000 to $5,000 plus one year probated suspension up to revocation and holds false, misleading or deceptive advertising. The page prints no revision date. source
• Tex. Occ. Code 51.302 The statutory ceiling on an administrative penalty. Not more than $5,000 per day for each violation, and each day a violation continues or occurs is a separate violation. source
• Tex. Occ. Code 1305.303 Criminal penalty. Four offenses, all Class C misdemeanors. Vehicle marking and advertising are not among them. source