48 U.S.C. § 915
Bonds as public debt
Such bonds shall not be a debt of Puerto Rico or any municipality, and shall not constitute a public indebtedness within the meaning of section 3 of the Act of Congress approved March 2, 1917 , entitled “An Act to provide a civil government for Porto Rico, and for other purposes”, as amended.
( June 25, 1938, ch. 703, § 5 , 52 Stat. 1203 .)