Is the monthly databases for CODE-1 Plus, Finalist, Verimove and Canadian CODE-1 Plus cumulative?

Products Affected:  CODE-1 Plus, Finalist,  Verimove, Canadian CODE-1 Plus
The US Postal, Verimove, City/ZIP+4 and Canadian CODE-1 Plus databases are cumulative.  Is acceptable to go from one month to another directly without having to install previous month database.
UPDATED:  July 9, 2019