How long does a senior citizen have to be in Canada before they can get access to old age security?

a) 5 years
b) 3 years
c) 10 years

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.