Procedures for Calculating the Maximum Period of Stay for R-1 Nonimmigrants: "This memorandum provides instruction to Immigration Service Officers who adjudicate R-1 nonimmigrant petitions for aliens who are coming to the United States temporarily to perform religious work, and their dependents. This memorandum outlines the procedure to be used for recapturing time spent outside the United States by R-1 nonimmigrants when seeking an extension of their R nonimmigrant status. This guidance applies to all R-1 petitions seeking to recapture time that are currently pending with USCIS or to new petitions filed on or after the date of this memorandum." - USCIS, Mar. 8, 2012.