486.3. For the purpose of applying section 144 for the taxpayer’s taxation year in which the taxpayer pays a specified amount, the amount to which section 144 applies is to be determined as if,(a) where the taxpayer was in existence at the time the original amount became receivable by a person referred to in section 90 or became payable to such a person, the specified amount had been paid by the taxpayer at that time; and
(b) in any other case, the taxpayer were in existence and had a calendar taxation year at the time the original amount became receivable by a person referred to in section 90 or became payable to such a person and the specified amount had been paid by the taxpayer at that time.
The first paragraph does not apply to a specified amount paid by a taxpayer if(a) the recipient is a partnership;
(b) the original amount became receivable by a person referred to in section 90 or became payable to such a person in a particular fiscal period of the partnership;
(c) the taxpayer is a member of the partnership at the end of the particular fiscal period; and
(d) the taxpayer paid the specified amount before the end of the taxation year of the taxpayer in which the particular fiscal period ends.