从永久居民开始计算。在申请時要附上比如加籍护照等文件。而且在申请表格里要填写有没有离开过加拿大,离开多久等问题。政府会去边境部门查询是否有没有做假。
我看service canada 上的官方文件 并没有说 从 永久居民开始算起。 see below:
To be eligible for the Old Age Security (OAS) pension you must be at least 65 years of age and meet the
legal status and residence requirements:
Legal status: If living in Canada, you must be a Canadian Citizen or legal resident at the time we
approve your OAS application; if living outside Canada, you must have been a Canadian Citizen or legal
resident of Canada when you left.
Residence: If living in Canada, you must have resided in Canada for at least 10 years since age 18; if
living outside Canada, you must have resided in Canada for at least 20 years since age 18. If you do not
meet the 10 or 20 year residence requirement, you may still be eligible for the OAS pension if you have
lived or worked in a country with which Canada has a social security agreement.