Will people who buy short-term plans be exempt from the individual mandate penalty? Currently, they are not. If the individual mandate is waived for people who buy short-term plans, they could cherry pick lots of healthy people and leave the ACA marketplace with a sicker pool and higher premiums.

Will association plans be permitted to enroll self-employed people as well as small businesses? If so, it could have an effect on the individual market.

Will states be preempted from regulating association plans? If so, these loosely regulated plans could be sold across state lines and destabilize the small business health insurance market. Small businesses with a sick employee could find themselves priced out of insurance.