Yesterday a new license plate graphic for Phrae province was announced in the Royal Gazette, overriding the design announced in 2004.
The new design shows . In the background are the special rock formations of Phae Mueang Phi (แพะเมืองผี, literally "goat ghost town"), located about 10km northeast of the town Phrae.The blue wave in front probably refers to the Yom river, which flows through the province. The bird to the bottom right is a Siamese Fireback (Lophura diardi), which is found in the province. I am not sure what the tree in the left background are supposed to mean however.
The old design did only show the rock formations of Phae Mueang Phi.
For details on the next auction of these plates, the Phrae office of the Department of Land Transport has a brochure on their website.