Extinction of ObligationsPrevention of Performance Or Offer
Section § 1511
This law explains situations where someone is excused from fulfilling a contract or making an offer. You're not at fault if you can't perform because the other party stopped or delayed you, or if the law says you can't. You might need to let the other party know in writing if you plan to claim more time or take legal action. Performance is also excused if a natural disaster or enemy action prevents it, unless you agreed otherwise in the contract. Lastly, if the other party's actions made you think you shouldn't perform, you're excused from performing.
Section § 1512
If you owe something to someone and they stop you from fulfilling that obligation, you get to enjoy any benefits that would have come your way if you'd been able to finish your part as planned.
Section § 1514
If something happens beyond the debtor's control that stops them from fulfilling their obligation, they should still receive a fair share of what they were promised, based on how much the creditor benefited from any work they were able to do.
Section § 1515
If someone you owe money to (a creditor) says they won't accept payment before you actually try to pay, it's like you offered and they already refused. However, if they let you know before the payment is due that they changed their mind and are willing to accept it, the previous refusal doesn't count.