maintenance outage

"maintenance outage" means a planned outage for the purpose of performing work on a major renewable energy installation, in which work could be postponed by at least seventy-two hours, but in the opinion of the feed-in approval holder should not be postponed until the next scheduled outage;
PU(A) 387/2011 - RENEWABLE ENERGY (TECHNICAL AND OPERATIONAL REQUIREMENTS) RULES 2011
2. Interpretation