The CMS unveiled an interim final rule late Friday that could help the Affordable Care Act’s struggling co-op plans. The rule also responds to insurers’ complaints that people are abusing special enrollments in the exchanges.

The CMS tightened the use of special enrollments, specifically making the rules around moving to a new home more restrictive to avoid any gaming of the system. Co-ops also can seek outside funding from investors to build up their capital, something that was outlawed previously.