Shinyparappally

Kindly give me reply. I wish to process my Husband open work permit and children study permit along with my work permit application. But I think it will be better they will come to Canada only after completing my probation period of 3 months. Is it possible they can travel on later date? I would like to know once TRV stamped on our Passport is there any time period they must enter Canada within the particular period like 2/3/6 months like that? When they will arrive at Canada POE is it required that my husband should present the original marriage certificate to the entry officer. Is it enough notary attested photo copy of the marriage certificate? If I (The principle applicant)will travel to Canada alone shall I need to present original marriage certificate also to the POE. Now I am confusing who will hold the original marriage certificate?

Because, here in UAE visa system I have seen that once visa stamped on passport it written that entry within 3 months so i am asking this question is it same like canada visa also?