42 CFR §412.258

1. (a)The party or parties to an MGCRB proceeding are the hospital or group of hospitals requesting a change in geographic designation.
2. (b)CMS has 30 days from the date of receipt of notice of a complete application to submit written comments and recommendations (with a copy to the hospital) for consideration by the MGCRB.
3. (c)The hospital has 15 days from the date of receipt of CMS's comments to submit written comments to the MGCRB, with a copy to CMS, for the purpose of responding to CMS's comments.