So, hypothetically you are some guy trying to figure out if you have enough cards to form a union, or are some of them "stale dated". You need to show that more than half of the employees support you, so must be "members in Good Standing" or have applied for membership within a certain period. Being dutiful and effective look into the legislation and you find this:
So, if your cert application is made on January 1, 2008 what is the oldest Membership card you can have in the pile?a "member in good standing" is one who:
(a) at the date of the filing of the Application for Certification has joined or signed an application for membership in the trade union; and
(b) within the period from the first day of the third month preceding the calendar month in which the Application for Certification is made to the date of the Application for Certification has paid, on his own behalf, to the trade union at least $2.00 in union dues.