Your statement;"Should your spouse later choose to file or be required to file, your spouse will be constrained to use whichever method (standard or itemized) you chose for your tax return.", contradicts another found on this site.
According to a similar scenario, "recommended answer" if one itemizes, both have to. The recommended answer referenced the rule of "itemizing filing separate"where no matter who itemizes it will require the other to do the same, forcefully.
