<?php
$config->story->create->requiredFields = 'estimate,title';
$config->story->edit->requiredFields   = 'estimate,title';
$config->story->change->requiredFields = 'title';
$config->story->close->requiredFields  = 'closedReason';
$config->story->review->requiredFields = 'assignedTo,reviewedBy,result';