ROCKLAND, Maine — The election season formally begins this week with nomination papers available for candidates.

The City Council seat held by Mayor Frank Isganitis is up for election this fall. Isganitis is completing his first three-year term on the council and his first year as mayor.

Isganitis, who is co-owner and operator of the Limerock Inn in Rockland, did not immediately respond Monday to an email query about whether he planned to seek another term.

Two seats representing Rockland on the Regional School Unit 13 Board — currently held by Esther “Tess” Kilgour and Nancy Jeffers — also come up for a vote this year. Jeffers said Monday she would seek another term, while Kilgour could not be immediately reached for comment.

Jeffers has served for three years on the RSU 13 Board. She also served four years on the predecessor School Administrative District 5 Board, after being appointed to a vacancy by the City Council in 2005 and then winning a three-year seat in 2006. She is a business consultant.

Kilgour has served on the SAD 5 Board and then the RSU 13 Board since 2006. She served as chairwoman from 2014 through March 2014. She works as a medical laboratory technician.

There also is one vacant position on the Rockland Port District up for a vote in November.

Nomination papers must be returned to City Hall with at least 100 signatures of registered Rockland voters by Sept. 21 to get on the Nov. 3 ballot.