Allow looser rules for dates
Approximate Date Effective
The value should be in ISO 8601 date format; specifically YYYY or YYY-MM.
Values may be just a year (e.g. 2026) or a year and a month (e.g. (2026-05). If the full date, i.e. year, month and day, are known use ceterms:dateEffective.
Approximate date after which this resource is available or applicable.
Add ability to make statements required for conformance with regulations.