My town's new in-ground irrigation ORDINANCE:

THE PERMIT FEE SHALL BE TWO HUNDRED DOLLARS ($200.00). ADDITIONALLY
THE APPLICANT SHALL OBTAIN A PLUMBING PERMIT FROM FREDERICK COUNTY.

They even specify the controller:

SUCH TECHNOLOGICAL DEVICES, SOMETIMES REFERRED TO AS "SMART
CONTROLLERS", SHALL INCLUDE:
(A) RAIN SENSORS WHICH PREVENT THE USE OF THE SYSTEMS DURING RAIN
OR OTHER PRECIPITATION EVENTS.
(B) GROUND SENSORS WHICH MEASURE THE MOISTURE IN THE SOIL TO AVOID
UNNECESSARY USE OF THE SYSTEM WHEN THE GROUND MOISTURE IS HIGH; AND
A. PROGRAMMABLE TIMER SYSTEMS TO PREVENT THE USE OF THE
SYSTEM DURING TIMES OF WATER RESTRICTIONS AS ESTABLISHED BY ORDINANCE
OR BY THE BURGESS AND COMMISSIONERS PURSUANT TO TITLE 13 OF THIS CODE.
B. INSTALLER SHALL PROVIDE EVIDENCE OF TRAINING OR
CERTIFICATION FOR THE DESIGN AND INSTALLATION OF IRRIGATION SYSTEMS.