The Brecon Beacons National Park is calling on businesses and residents to help shape its future.
Officials are asking people to have their final say about proposed changes to its local development plan.
They have launched an eight-week consultation period, which runs until 29 December.
Last week, there were calls for an inquiry into the park authority after rows involving its planning department.
There have been six other phases of public consultation since the process for a new local development plan started in September 2007.
The plan lays down the framework for making decisions about future planning applications.
Tracy Nettleton, head of strategy, policy and heritage at the park authority, said: "This is one of the most important documents we've ever produced for the national park.
"We are inviting everyone to make their final comments to the proposed plan because we want this document to be a fair representation of all our communities."
Last week, BBC Wales' Week In Week Out programme reported claims that the authority was making too many mistakes and failing to communicate properly over some planning applications.
It lost more than half of the 26 appeals against decisions last year.
The park said it was "proud" of improvements to its planning service.