To the extent permissible under this chapter, any research program developed pursuant to this chapter shall be designed to permit the voluntary enrollment of all individuals under 18 years of age having medication-resistant epilepsies who are residents of this state and who:
(1) Have been residents of this state for the 24 month period immediately preceding their entry into the program; or
(2) Have been residents of this state continuously since birth if they are less than 24 months old at the time of their entry into the program.