A draft nuclear deal between Iran and six major powers calls for United Nations inspectors to have access to all suspect Iranian sites, including military locations, based on consultations between the powers and Tehran, a diplomatic source said on Tuesday.

The source also said that if the deal is accepted, a U.N. Security Council resolution on it would ideally be adopted this month and the steps to be taken by both sides — including Iranian limitations on its nuclear programme and relief from sanctions on Iran — would be implemented in the first half of 2016.

The details of the draft deal, which is still being negotiated, are broadly in line with an interim agreement clinched on April 2 in Lausanne, Switzerland.