1029.8.6.7. Where all of the corporations that are associated with each other in a taxation year and to which section 1029.8.6.6 applies have filed with the Minister, in the prescribed form, an agreement whereby, for the purposes of section 1029.8.6.2, they allocate an amount to one or more of them for the taxation year and the amount or the aggregate of the amounts so allocated, as the case may be, equals $3,000,000, the expenditure limit for the year of each of the corporations is equal to the amount so allocated to it.