P.R. Laws tit. 31, § 4572
2019-02-20 00:00:00+00
The obligation of a person taking money on loan shall be governed by the provisions of § 3174 of this title.
If what has been loaned is another perishable thing, or a quantity of metal, not coined, the debtor owes a quantity equal to that received, and of the same kind and quality, even though it may have suffered a change in its value.
History —Civil Code, 1930, § 1645.