本文发表在 rolia.net 枫下论坛Old Age Security Pension
The Old Age Security pension is a monthly benefit available, if applied for, to most Canadians 65 years of age or over. Old Age Security legal status and residence requirements must also be met. An applicant's employment history is not a factor in determining eligibility, nor does the applicant need to be retired. Old Age Security pensioners pay federal and provincial income tax. Higher income pensioners also repay part or all of their benefit through the tax system.

Eligibility conditions: To qualify for an Old Age Security pension, a person must be 65 years of age or over, and

1.must be a Canadian citizen or a legal resident of Canada on the day preceding the application's approval; or

2.if no longer living in Canada, must have been a Canadian citizen or a legal resident of Canada on the day preceding the day he or she stopped living in Canada.

A minimum of 10 years of residence in Canada after reaching age 18 is required to receive a pension in Canada.

这里的legal resident ，估计一定不会是指包括临时的visitor legal resident，应该是移民状态的resident.更多精彩文章及讨论，请光临枫下论坛 rolia.net

在移民登录前合法居住在加拿大的期间，是否记入OLD AGE SECURITY养老金计算程序，主要是以是否有perminent residency intent in Canada, 如果申请人能够像SERVICE CANADA OFFICER证明在移民前居住的那段时期，已经主动或有明显意图放弃其他国家的居住权，而选择加拿大作为永久居住地，那么所居住的那段时间，即使尚未获得移民身份，也将会被记入养老金的计算年限。入股偶是以求学，工作为主要目的，那就明显不符合上述要求了。
一我岳父岳母的案子说，因为在他们以探亲身份来加拿大前，已经提交了开始移民申请程序（移民担保申请），CIC给我们的3年前回复可以作为有效证据被接受。当然，将来具体的裁定还是一当时的officer的裁决为准。
期间短期的离境，只要证明不是重新选择永久居住地，就不会影响该裁定。 当然，离境时间越久，对当事人就越不利。至于6个月的说法，没有明确答复。
上面所写的，希望对于有同样疑惑的同学有帮助。 同样，如果有其他渠道的官方回复或案例， 也谢谢一起分享。