A separation agreement is recognized under the Family Law Act of Ontario as a domestic contract which can govern the terms of your breakdown between you and your spouse. It is a contract which is enforceable at law.
You should either have been guided by your lawyer while you were negotiating the separation agreement, or your lawyer negotiated the agreement for you.
Sometimes your division of property requires some things to be dealt with on an urgent basis. For example, if you might have an offer on your home and the spouses agree how to proceed. If that's the case, you can settle some of the issues using an “interim agreement”, and leave the rest for a final agreement.
If you negotiated the agreement, then your lawyer should review the agreement with you in reference to your rights and obligations under various provincial and federal laws, and amend it as necessary.