(b) Exceptions. (1) Notwithstanding any provision of law to the contrary, the receipts from the following shall be exempt from the tax on retail sales and the compensating use tax imposed by this section: All sales of tangible personal property for use or consumption directly and predominantly in the production of tangible personal property, gas, electricity, refrigeration or steam, for sale, by manufacturing, processing, generating, assembling, refining, mining or extracting; and all sales of tangible personal property for use or consumption predominantly either in the production of tangible personal property, for sale, by farming or in a commercial horse boarding operation, or in both.

(2) The transitional provisions contained in section eleven hundred six shall not apply to the taxes imposed by this section.

(3) Where a sale of tangible personal property or services, including an agreement therefor, is made in a city in which the taxes imposed by subdivision (a) of this section apply, but the property sold, the property upon which the services were performed or such service is or will be delivered to the purchaser elsewhere, such sale will not be subject to taxes imposed by such subdivision (a). However, if delivery occurs or will occur in any city where the tax imposed by such subdivision (a) applies, a vendor will be required to collect from the purchaser, the sales or compensating use taxes imposed by this section. For the purposes of this section delivery shall be deemed to include transfer of possession to the purchaser and the receiving of the property or of the service by the purchaser.

(4) The provisions of section twelve hundred fourteen shall be applicable to this section, but any reference in that section to a local sales or use tax imposed by a city shall mean the additional taxes imposed by subdivision (a) hereof.

(5) Where a retail sales tax or a compensating use tax was legally due and paid to any municipal corporation in this state, without any right to a refund or credit thereof, with respect to the sale or use of tangible personal property or any of the services subject to sales or compensating use tax, if the use of such property or services is then subject to the compensating use tax imposed by this section and such tax is at a higher rate than the rate of tax imposed by such municipal corporation, the tax imposed by this section shall also apply but only to the extent of the difference in such rates. For purposes of this subdivision, a payment to the tax commission of a tax imposed by a municipal corporation shall be deemed a payment to such municipal corporation.

(c) Termination of taxes. At the end of the last day of the month in which all the notes and bonds of such municipal assistance corporation shall have been fully paid and discharged, together with interest thereon and interest on unpaid installments of interest, the taxes imposed by this section shall terminate. Despite such termination, the provisions of this section and any regulations promulgated thereunder, including the provisions with respect to assessment, payment, termination, collection and refund of such taxes, the requirements for filing returns, preservations of records and disposition of revenue shall continue in full force and effect with respect to all such taxes accrued up to the effective date of such termination.