42 C.F.R. § 56.102
As used in this part:
(b)
(1) Agriculture means farming in all its branches, including—
(g)
(1) Migrant health center means an entity which either through its staff and supporting resources or through contracts or cooperative arrangements with other public or private entities provides for migratory agricultural workers, seasonal agricultural workers, and the members of the families of such workers, within its catchment area:
(2) For purposes of paragraph (g)(1) of this section, the provision of a given service by a center will be determined by the Secretary to be appropriate where
(l) Primary health services means:
(6) Preventive dental services provided by a licensed dentist or other qualified personnel, including—
(o) Supplemental health services means health services which are not included as primary health services and which are: