771R31. Where a corporation referred to in this division operates an airline service, ships, hotels or derives substantial revenues with respect to rights relating to natural gas or petroleum, the proportion that the business carried on in Québec is of the aggregate of that carried on in Canada or in Québec and elsewhere by the corporation is that as is respectively established in(a) Division V in respect of that part of its tax for the year that may reasonably be attributable to the operation of its airline service;
(b) Division IX in respect of that part of its tax for the year that may reasonably be attributable to the operation of its ships;
(c) Chapters I and II in respect of that part of its tax for the year that may reasonably be attributable to the operation of its hotels, or, as the case may be, to the ownership of rights relating to petroleum or natural gas or to any interest in such rights; and
(d) section 771R29 in respect of the remainder of its tax.