The affiliated membership of a church is much larger than the formal membership.

The party does not have a formal membership.

There is a distinction here between personal religious experience and formal membership of a religious tradition.

There was initially no formal membership, but during the 1930s they were known to have had a membership secretary.

As a matter of agreed principle it had no formal membership and no written constitution.

However formal membership within the Guardians consisted of various offices and seven grades.

We don't have formal membership to the exclusion of everyone else.

This action is usually framed by formal membership and form (institutional rules).

Thus formal membership was restricted to male Austrian citizens aged 24 years or above.

Almost all of the presidents can be characterized as Christian, at least by formal membership.