i am a tour guide license and driver.
A Regional Tour Guide License (Northern Region) in Thailand covers 17 provinces, as follows ?

1.Chiang Mai


2.Chiang Rai


3.Lamphun


4.Lampang


5.Mae Hong Son


6.Phrae


7.Nan


8.Phayao


9.Uttaradit


10.Tak


11.Sukhothai


12.Phitsanulok


13.Phetchabun


14.Kamphaeng Phet


15.Phichit


16.Nakhon Sawan


17.Uthai Thani



> ? Therefore, a Northern Region Guide License allows you to guide tours only within these 17 provinces.