Can the developer revise the completion date after registration of Project with Authority?

A promoter can approach the Authority & apply for extension of the date of completion of the project, under FORCE MAJUEREas explained under RERA.
Also the Authority may in reasonable circumstances, without default on the part of the promoter, based on the facts of each case, and for reasons to be recorded in writing, extend the registration granted to a project for such time as it considers necessary. However in aggregate this shall not exceed a period of one year.