The Operating Cost Adjustment Factors (OCAF) for 2019 were published in the November 23, 2018 Federal Register.
These factors are used for adjusting or establishing Section 8 rents under the Multifamily Assisted Housing Reform and Affordability Act of 1997 (MAHRA), as amended, for projects assisted with Section 8 Housing Assistance Payments. The factors are effective February 11, 2019 and can be found here.