Source: http://uslex.com/Non-Immigrant-Visas/Business-Visas/R-Visas.html
Timestamp: 2019-04-22 20:42:53+00:00

Document:
R Visas are issued pursuant to INA §101(a)(15)(R), 8 U.S.C. §1101(a)(15)(R); 22 C.F.R. §41.58; 8 C.F.R. §214.2(r); 60 FR 42034-37 (Aug. 15, 1995); 73 FR 72276-97 (Nov. 26, 2008).
(1) Member of a religious denomination for at least two years immediately preceding the time of application for admission that has a bona fide nonprofit religious organization in the U.S.
(a) Religious Occupation requires that the duties must primarily relate to: (i) a traditional religious function and be recognized as a religious occupation within the denomination; (ii) clearly involve inculcating or carrying out the religious creed and beliefs of the denomination; (iii) not include positions that are primarily administrative or support such as janitors, maintenance workers, clerical employees, fundraisers, person solely involved in solicitation of donations or similar positions but may include incidental administrative duties to religious functions; and (iv) not be solely for religious study or training for religious work, although a religious worker is not barred from such training or study. 8 C.F.R. §214.2(r)(3).
(c) Religious Denomination is a group or community of believers that is governed or administered under a common type of ecclesiastical government and includes one or more of the following: (i) common form of worship; (ii) common doctrine; (iii) common services; (iv) common established place of worship; or (v) comparable indicia.
Five-year maximum period unless residing abroad and physically present outside U.S. for one year. Five-year limitation does not apply if person did not reside continually in U.S. and whose employment is seasonal, intermittent, or less than 6 months per year or if the person resides abroad but regularly commutes to U.S.
Not work in the U.S. in any other capacity but as a minister or religious worker, but may work for more than one qualifying employer as long as each files a petition. 8 C.F.R. §§214.2(r)(1)(v), (2).
Admission or change of status is limited to 30 months for the initial period. 8 C.F.R. §214.2(r)(4)(i).
An extension of stay may be filed for an additional 30 months up to 5-year maximum, but must be accompanied by a supplemental petition, supporting documents, and information regarding previous employment as an R-1 in the form of financial or other records to establish that person worked as R-1 for first 30-month period. 8 C.F.R. §214.2(r)(5),(12).
R-2 Visas for Spouses and Children of R-1 are issued pursuant to 8 C.F.R. §214.2(r)(4)(ii). R-2 Visa holders are subject to same time limits as principal R-1, irrespective of time actually spent in U.S. R-2 visa holder cannot accept employment. R-2s "are not required to demonstrate a residence abroad which they have no intention of abandoning." 9 FAM 41.58 N13.1-13.2.

References: §101
 §1101
 §41
 §214
 §214
 §214
 §214
 §214