Casper v. Preston
In Casper v. Preston, No. 01-01-00322-CV, 2003 WL 1563985 (Tex. App.--Houston 2003, no pet.)(memo. opin.), the mediated agreement entered pursuant to Family Code 153.0071 provided for a "Standard Possession Order" and stated that the father could possess the children for an extended summer vacation of "at least 21 days."
After the trial court entered a decree that provided only 21 days of extended summer possession, the appellate court reformed the order to provide for weekend visitation throughout the year and added 30 days of summer vacation possession, 21 of which could be exercised as extended summer possession.