PORTLAND — Wall Street demonstrators seeking to keep their encampment in Portland have filed an amended petition offering to get liability insurance and to limit the number of people sleeping overnight.

The original petition filed last week by OccupyMaine would have reduced the size of the encampment in Lincoln Park, but it included no restrictions on the number of people or tents. The group also said the city’s liability insurance requirement placed an unfair burden on free speech.

The amended permit request would allow only 50 people to sleep overnight. It was delivered today, two days before the City Council takes up the matter.

Last week, the council’s Public Safety Committee recommended that the full council reject OccupyMaine’s request. Committee members expressed concern about sanitation and public safety.