CRA applies its view that a partner is attributed each PE of a partnership for Reg. 400/403 purposes

Under Regs. 403(1) and (3), a property insurer (or, in this case, a reinsurer) is required to allocate its taxable income to the provinces on the basis of the respective proportions of its net property insurance premiums that are arrived at by allocating its net premiums to the provinces where the insured property is situate – except that if it does not have a permanent establishment in a particular province, the net premiums for the insured property in that province are allocated to the province which has a PE to which those net premiums are “reasonably attributable.”

CRA indicated that, even in this specialized context, it considers that a limited or general partner has a PE wherever the partnership has a PE, so that the reinsurer in question was considered for Reg. 403 purposes to have a PE in various provinces by virtue of being a partner - even though the partnership in question did not carry on any insurance business.

Neal Armstrong. Summary of 8 June 2018 Internal T.I. 2018-0744881I7 under Reg. 403(3).