PLAINFIELD — About two weeks after he resigned, Riley Carlson has been reappointed to the select board, and the petitions that prompted him to quit have been challenged for their legality.

Carlson announced on Dec. 26 that he was stepping down from the board effective immediately. He had been serving as the board’s chair. He was initially appointed to the board in October 2022 after Tammy Farnham resigned in June 2022. Carlson then ran unopposed for the last year on that three-year seat at the town’s annual meeting in April.