1976/1986 comparability indicator

This field is represented by a one digit code as follows:

0 = comparable CD between the 1976 and 1986 Censuses (i.e. the 1976-1981 comparability indicator code was 0 and the 1981-1986 comparability code was 0 or 1).

1 = any situation where the 1976 CD is not comparable with the 1986 CD.