Look at ITT 221 R3, in particular clause 20 on sojourning in Canada. It’s thrust is to deem a person who does not have sufficient ties to Canada, but who spends more than 183 days in Canada, a taxpayer, hence taxable on worldwide income received throughout the entire year.
Sojourners
¶ 20. An individual who has not established sufficient
residential ties with Canada to be considered factually
resident in Canada, but who sojourns (that is, is temporarily
present) in Canada for a total of 183 days or more in any
calendar year, is deemed to be resident in Canada for the
entire year, under paragraph 250(1)(a) of the Act.
But conversely, if that person spends less than the 183 days, and lacks the other major ties to Canada, it follows that he/she is NOT taxable on worldwide income throughout the entire year.
The purpose of the next paragraph is to catch him/her if she falls under para 250 of the Income Tax Act. Paragraph 250 deals with people who work for a Canadian company or Canadian government abroad, or are members of the armed forces. But if the person is not caught by para 250, and (again) has insufficient ties to Canada, this clause 20 (again) allows for them to be in Canada and yet not be taxable on foreign incoe while outside Canada.
Note the wording: “In particular, whereas an individual who is resident in Canada for part of a year is only taxed on his or her worldwide income for that part of the year ….”(my italics)
Clearly (to me at any rate) that person is taxed on foreign income only while he/she is in Canada, and it follows that he/she is not taxed on foreign income while outside Canada.
The remainder if that paragraph is included here so you can come to your own conclusion about its relevance (or irrelevance) to someone who is not caught by para 250.
“… in accordance with the rules under section 114 of the Act, the individual who is deemed to be resident in Canada pursuant to paragraph 250(1)(a) of the Act is liable for tax on his or her worldwide income throughout the year.”