Full text
the trust’s taxation year that began before December 16 of the particular year and, but for this paragraph, would end at the end of the particular year (or, where the first taxation year of the trust began after December 15 of the preceding calendar year and no return of income was filed for a taxation year of the trust that ended at the end of the preceding calendar year, at the end of the preceding calendar year) is deemed to end at the end of December 15 of the particular year;