23 C.F.R. § 1200.24
(b) Definitions. As used in this section—
Driving means operating a motor vehicle on a public road, including operation while temporarily stationary because of traffic, a traffic light or stop sign, or otherwise, but does not include operating a motor vehicle when the vehicle has pulled over to the side of, or off, an active roadway and has stopped in a location where it can safely remain stationary.
Texting means reading from or manually entering data into a personal wireless communications device, including doing so for the purpose of SMS texting, emailing, instant messaging, or engaging in any other form of electronic data retrieval or electronic data communication.
(c) Qualification criteria. To qualify for a distracted driving grant in a fiscal year, a State shall submit the assurances in Part 4 of Appendix D, signed by the Governor's Representative for Highway Safety, providing legal citations to the State statute or statutes demonstrating compliance with the following requirements:
(1) Prohibition on texting while driving. The statute shall—
(iii) Establish—
(2) Prohibition on youth cell phone use while driving. The statute shall—
(iv) Establish—
(3) Permitted exceptions. A State statute providing for the following exceptions, and no others, shall not be deemed out of compliance with the requirements of this section:
(d) Use of grant funds.