How to setup options for enrollment in November that aren't effective until July.

Hi,

We have the need to setup a new plan and option for election during our annual open enrollment, but upon enrollment this particular option and associated rates should not be effective until 7/1/future year.  Open enrollment takes place in November with an effective date of 1/1 future year for all of our current plans.  This new plan would be the only one that would not be effective 1/1/future year.  Is it possible to set this up?  If so, does anyone have any documentation on how to do it?

Thanks,

Eric