There are exempted from the computation of the amount of the sales tax the gross receipts from the sale of any tangible personal property to:

Notwithstanding any other provision of law the tax imposed under this part shall apply to the gross receipts from the sale of any tangible personal property to contractors purchasing such property either as the agents of the United States or for their own account and subsequent resale to the United States for use in the performance of contracts with the United States for the construction of improvements on or to real property in this State.

There are exempted from the computation of the amount of the sales tax the gross receipts from the sale in this state of tangible personal property to a holder of a valid seller’s permit issued under Section 6067 when the property is used by the purchaser outside of this state in his performance of a contract to improve real property and, as a result of such use, is incorporated into and becomes a part of real property located outside of this state. This exemption shall apply only if the purchaser certifies in writing to the seller, in such form as the board may prescribe, that the property will be used in a manner and for a purpose herein specified.

There are exempted from the computation of the amount of the sales tax the gross receipts from sales of tangible personal property purchased for use solely outside this State and delivered to a forwarding agent, export packer, or other person engaged in the business of preparing goods for export or arranging for their exportation, and actually delivered to a port outside the continental limits of the United States prior to making any use thereof.

Where a new or remanufactured truck, truck tractor, semitrailer, or trailer, any of which has an unladen weight of 6,000 pounds or more, or a new or remanufactured trailer coach or a new or remanufactured auxiliary dolly, is purchased from a dealer located outside this state for use without this state and is delivered by the manufacturer or remanufacturer to the purchaser within this state, and the purchaser drives or moves the vehicle from the manufacturer’s or remanufacturer’s place of business in this state to any point outside this state within 30 days from and after the date of the delivery, there are exempted from the taxes imposed by this part

the gross receipts from the sale of and the storage, use or other consumption of the vehicle within the state, if the purchaser furnishes the following to the manufacturer or remanufacturer:

The State Board of Equalization shall prepare and distribute a standard form or forms for the purchaser affidavit required by Sections 6388 and 6388.5.

There are exempted from the computation of the amount of the sales tax the rentals payable under a lease of tangible personal property (a) when such rentals are required to be included in the measure of the use tax or (b) when such property is situated outside this state.

There are exempted from the computation of the amount of the sales tax the rentals payable under a lease of tangible personal property for any period of time for which the lessor is obligated to lease the property for an amount fixed by the lease prior to August 1, 1965, and the lessor did not elect under Sections 6094 or 6244 to pay use tax measured by the amount of the rental charge. The lessor shall be deemed not to be obligated for any period of time for which he has the unconditional right to terminate the lease upon notice, whether or not the right is exercised.

There are exempted from the computation of the amount of the sales tax the gross receipts from the sale of tangible personal property which, pursuant to the contract of sale, is required to be shipped and is shipped to a point outside this state by the retailer by means of:

For purposes of this section, the term “carrier” shall mean a person or firm engaged in the business of transporting

for compensation tangible personal property owned by other persons, and includes both common and contract carriers. The term “forwarding agent” shall mean a person or firm engaged in the business of preparing property for shipment or arranging for its shipment.