As per this link(wwwDOTcicDOTgcDOTca/english/express-entry/grid-crs.asp), Education credential Assessment(ECA) and Language test results(IELTS or CELPIP) seems to be be mandatory for the "accompanying SPOUSE or common law partner" of a principal applicant who are going to apply under Express entry for federal economic immigration programs like FSWP(Federal Skilled Worker Program) or Canadian Experience Class(CEC)
It seems to me that it is not a question of just getting additional points for "Spouse factors", principal applicants may also need to provide ECA and Language test results for the spouse in case if they are going to include the spouse in the PR application under express entry.
For example, if one's spouse has masters degree then they can't just say "UNEDUCATED" in their application.
but the moment when you say that "my spouse has masters degree" then the online system may ask to submit the proof for it(ECA). Similarly for Language test proofs also(IELTS or CELPIP)
Senior members, please correct me if I am wrong !