PORTLAND (AP) — Portland city attorneys say a citizens group’s proposal for a referendum to protect scenic waterfront views in the city is suitable for a citywide vote.

Soul of Portland filed an affidavit with the city on Tuesday, calling for a referendum to protect views of Portland Harbor and Casco Bay and establish a Scenic Viewpoint Task Force.

The group’s effort is in response to developers’ request to rezone the former Portland Co. complex for taller buildings.

A Portland city spokeswoman said the attorneys have determined the request is about a reasonable subject for a citizen’s initiative and the clerk’s office is now processing it. Residents can start collecting signatures in support of the measure when the language receives final approval.

Soul of Portland wants the referendum to take place in November.