Performance year
Performance year means the 12-month period beginning on January 1 of each year during the agreement period, unless otherwise noted in the participation agreement. For an ACO with a start date of April 1, 2012 or July 1, 2012, the ACO's first performance year is defined as 21 months and 18 months, respectively.
Source
42 CFR § 425.20
Scoping language
As used in this part, unless otherwise indicated -