In that case, you’d typically need to file a legal challenge, which could involve going to court and showing that the restriction is unnecessary or unreasonable.The best advice I can give would be to consult a real estate attorney to understand your specific situation and options.

You can legally change or cancel a contract if all parties agree. 

Is it legal to offer to rent the property back to the homeowner who already lost their home to foreclosure when negotiating the redemption rights purchase? 

Honestly, I would not sign any lease until you positively close and legally own the property.

If you need financial help, ask under the "Finance, Tax, and Legal" forum.

Make sure to get legal advice on what you can and can’t do for bill back and what kind of notice period is required in your state. 

Well anyone can write anything into a contract, but whether it is legal and enforceable is for the courts to decide...It is State law here that a contractor must call 811 or they are liable for the costs.

That's a technical banking and legal term.

Quote from @Cheryl Abram: What legal filed docs are LPs entitled to see to help validate a deal's failure?

Recommend having an attorney review it to confirm.If the PMA has legally expired, then the PMC is in the wrong - although they may still have claims for covering the legal expenses.