(a) Effective/applicability date. The rules of §§ 1.501(r)-1 through 1.501(r)-6 apply to taxable years beginning after December 29, 2015.

(b) Reasonable interpretation for taxable years beginning on or before December 29, 2015. For taxable years beginning on or before December 29, 2015, a hospital facility may rely on a reasonable, good faith interpretation of section 501(r). A hospital facility will be deemed to have operated in accordance with a reasonable, good faith interpretation of section 501(r) if it has complied with the provisions of the proposed or final regulations under section 501(r) (REG-130266-11 and/or REG-106499-12). Accordingly, a hospital facility may rely on § 1.501(r)-3 of the proposed or final regulations, or another reasonable interpretation of section 501(r)(3), for any CHNA conducted or implementation strategy adopted before the first day of the hospital organization's first taxable year beginning after December 29, 2015.