A borrower of money, unless there is an express contract to the contrary, must pay the amount due in such money as is current at the time when the loan becomes due, whether such money is worth more or less than the actual money lent.
Mont. Code Ann. § 31-1-102
Loan to be repaid in current money
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.