An amended flood plain bylaw easily passed at Rochester Town Meeting on Monday despite alleged inaccuracies in the Federal Emergency Management Agency’s flood maps.

The vote ends a three-year saga for the bylaw that started when key language was mistakenly deleted prior to a 2011 Annual Town Meeting vote.

Residents whose homes are inside the FEMA boundaries must now purchase flood insurance. Additional restrictions and fees apply as well. Building home additions will be subject to federal guidelines and it’s believed that selling homes in flood plains will be more difficult due to the restrictions.

Voters at November’s Special Town Meeting defeated a measure to reinsert language into the town’s flood plain district bylaw.

The Planning Board and the Conservation Commission put the proposal together to correct a mistake made at Annual Town Meeting. Due to a computer error, one page was omitted from the bylaw, which was approved without opposition at the spring meeting.

When Planning Board member Ben Bailey’s discovered that his home was within the new flood plain he said FEMA should correct the maps. He expressed his dissatisfaction in board meetings leading up to Monday, but supported the new maps.

No one opposed the bylaw on Monday. If defeated homeowners in the federally designated flood zones would not be eliglible for federal assistance in the case of an emergency. Also, those homeowners would have to purchase flood insurance at an increased rate, outside of the federally subsidized rate.