California Code, Education Code - EDC § 17092.3

A school district may sublease any portable classroom obtained by the district pursuant to subdivision (c) of Section 17091 to a private provider that has entered into a contract with the district to provide any child care and development program or programs or any recreation or enrichment activities or programs for schoolage children on a schoolsite. The terms of the sublease for rental payments and other related costs shall not exceed the costs of the portable classroom to the district.