42 CFR §456.433

1. (a)When a beneficiary is admitted to the ICF under admission review requirements of this subpart, the group performing UR assigns a specified date by which the need for his continued stay will be reviewed;
2. (b)The group performing UR bases its assignment of the initial continued stay review date on the methods and criteria required to be described under § 456.435(a);
3. (c)The initial continued stay review date is—
   1. (1)Not later than 6 months after admission; or
   2. (2)Earlier than 6 months after admission, if indicated at the time of admission; and
4. (d)The group performing UR insures that the initial continued stay review date is recorded in the beneficiary's record.