A spouse (and child) who initially applied from 9th July 2012 needs to complete 5 years under Appendix FM before applying for settlement.
Child over 18 may be included in spouse's FLR(M) form when applying for an extension and should not lead an independent life, etc. KoLL required when applying for settlement.
Extension form FLR(M) for spouse and child.
Settlement form SET(M) for spouse.