What is a Public Weighmaster?

A Public Weighmaster is a licensed person who is in the business of weighing:

Any object or item for the public generally for hire or for internal use and issuing for that weighing a weight certificate intended to be accepted as an accurate weight upon which a purchase or sale is to be based or on which a service fee is to be charged; or

For hire motor vehicles*, trailers, or semi-trailers and issuing weight certificates intended to be accepted as an accurate weight for the purpose of determining the amount of any tax, fee, or other assessment on the vehicles.


*Note that "for hire" differs from vehicles for hire such as taxi, livery, and limousines. If you have questions about vehicle for hire regulations please contact the Arizona Department of Transportation .


How do I become a Public Weighmaster?

1. Complete a Public Weighmaster Application and email the application to [email protected], or fax the application to (602) 542-0466

2. Complete a Statement of Lawful Presence to Apply for State Issued Certification/License.

3. Pass the certification exam. All Public Weighmaster applicants are required to take a certification exam. The Central Licensing Division administers these examinations. For more information, please email [email protected] or call (602) 542-3578.

4. Pay the annual Public Weighmaster license fee - $48.00.

5. Obtain an official weighmaster stamp or seal (our licensing staff are able to provide details about ordering a stamp or seal).


How do I become a Deputy Public Weighmaster?

A Deputy Public Weighmaster performs weighmaster duties on behalf of a Public Weighmaster. Deputies utilize the official stamp or seal assigned to the Public Weighmaster when producing weight certificates. To become a Deputy Public Weighmaster, follow these steps:

1. Complete a  Deputy Public Weighmaster Application. Instead of a certification exam requirement, Public Weighmasters are responsible for training Deputy Public Weighmasters. Public Weighmasters must sign the application for each Deputy Public Weighmaster that will utilize their stamp or seal. The signature certifies that the Deputy Public Weighmaster has received proper training in regard to Public Weighmaster requirements within the State of Arizona.

2. Complete a Statement of Lawful Presence to Apply for State Issued Certification/License.

3. E mail the completed application to [email protected], or fax the application to (602) 542-0466

4. No fee is required to be licensed as a Deputy Public Weighmaster.


How do I become a Limited Weighmaster?

Limited Weighmasters are public safety officials who perform commercial vehicle enforcement activities. Limited Weighmasters must submit an application, no test or fee is required.

1.  Complete the Limited Public Weighmaster Application

2. E mail the completed application to [email protected], or fax the application to (602) 542-0466

3. No fee is required to be licensed as a Limited Public Weighmaster.


What do I need to know to pass the test?

The test is based on Arizona Revised Statutes, Title 3, Chapter 19, Arizona Administrative Code, Title 3, Chapter 7, Article 5, and NIST Handbook 44.

Also, refer to:


Testing Information

PLEASE NOTE:  To decrease wait times, we strongly encourage you to make an appointment by calling 602-542-3578 or emailing [email protected]

Our licensing office is at the Arizona Department of Agriculture Central Licensing building at 1010 W Washington Street, Phoenix, AZ 85007. 

  • Testing is conducted Tuesday - Thursday from 8:00 AM to 3:00 PM except state holidays.
  • Please be advised – applicants may not take the same exam more than once in a seven (7) day period.
  • Pursuant to Arizona Administrative Code R3-7-501 (B). “… A person may not take the examination more than two (2) times in six (6) months.
  • So you want to make sure you have prepared before coming in to take the exam. If you have to drive a long distance and do not pass, you will not be allowed to take the exam again for seven days.
  • Our test tak seating space is limited. If more than four people are coming in at once, some will have to wait for an open seat. If you have over eight people needing to test, please contact licensing in advance to see if we can make accommodations.

Links to available study materials for the exams can be found elsewhere on this page.

Prospective testers should complete the Test Taker Contact Form and bring it to the testing site.

If you have any additional questions or concern with regard to testing, feel free to contact the Licensing Staff via email at [email protected]  or via telephone at 602-542-3578.

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Electronic Signatures and Seals are Permitted

The name and image of the seal of the public weighmaster and deputy public weighmaster may be imprinted electronically on the weighmaster certificate in lieu of a handwritten signature and pressed seal.


A public weighmaster may replicate the state-assigned seal in an electronic format for use as provided under subsection R3-7-505(D). A template is provided at https://agriculture.az.gov/file/1547 with an example https://agriculture.az.gov/file/1546


The public weighmaster or deputy public weighmaster shall have an individual login associated with the electronic signature and seal or other security measures to prevent non-licensed persons from using a login to complete weighments .


Important Documents

Weighmaster Letter Download
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