Sec. 4. PENSION ROLLS VALIDATED. All pensioners added to the pension rolls as pensioners under the terms of Chapter 10, General Laws of the Thirty-sixth Legislature, Regular Session, but subsequent to the enactment of Senate Bill No. 139, Chapter 94, Acts of the 43rd Legislature, Regular Session, making said Act applicable only to certain cities, shall hereafter be deemed proper and legal pensioners on the rolls of all cities wherein a pension system has been established under the terms of H.B. No. 30 and H.B. 31, Acts of the First Called Session of the 43rd Legislature.