A lender for exchange cannot require the borrower to fulfill his obligations at a time, or in a manner, different from that which was originally agreed upon.
Okla. Stat. tit. 15, § 306
Lender cannot modify contract
R.L.1910, § 1025.
Official source: Oklahoma Legislature. Reproduced from public-domain Oklahoma statutes; confirm against the official source for the current text. Not legal advice.