California Code, Revenue and Taxation Code - RTC § 6012.6

(a) For the purposes of this part, “gross receipts” from the sale of a factory-built school building, and the “sales price” of a factory-built school building, sold or stored, used, or otherwise consumed in this state shall be 40 percent of the sales price of the factory-built school building to the consumer.

(b) For purposes of this section, “factory-built school building” means any building designed in compliance with state laws for school construction and approved by the structural safety section in the office of the State Architect, which is either wholly manufactured or is in substantial part manufactured at an offsite location, to be assembled, erected, or installed on a site owned or leased by a school district or a community college district.

(c) For purposes of this section, the place of sale or purchase of a factory-built school building is the place of business of the retailer of the factory-built school building as provided in Section 7205, regardless of whether sale of the building includes installation or whether the building is placed upon a permanent foundation.