No, it means that as long as they are post-1961, they are already allowed, so no exception needed.
The contrast is with the 90M theme, where some under $300K players who would otherwise be illegal are allowed to fill out the roster. Especially for themes based on single teams, you sometimes need to weaken the rules for cheap players or it would be too hard to make a legal roster. That isn't true here, since it is such a flexible theme.