FCC is Federal Communication Commission, which issues licenses to the stations for specific frequencies. It also decides who is able to use which frequency for what purpose. Since Bluetooth is using unlicensed spectrum, FCC has no direct involvement with Bluetooth

Frequency-Hopping Spread-Spectrum (FHSS) is a spread spectrum modulation scheme that uses a narrowband carrier that changes frequency in a pattern known to both transmitter and receiver. Properly synchronized, they maintain a single logical channel. To an unintended receiver, FHSS appears as short-duration impulse noise. More simply, the data is broken down into packets and transmitted to the receiver of other devices over numerous "hop frequencies" (79 total) in a pseudo random pattern. Only transmitters and receivers that are synchronized on the same hop frequency pattern will have access to the transmitted data. The transmitter switches hop frequencies 1,600 times per second to assure a high degree of data security

CDMA stands for Code Division Multiple Access. It is a channel access method. It employs spread spectrum technology (Direct Spread Spectrum).
Transmitter Side:
In CDMA, a narrowband message signal is multiplied by a very large bandwidth signal celled the spreading signal. This spreading signal is a Psuedo Noise Code signal. All users in CDMA system use the same carrier frequency and may transmit simultaneously. Each user is identified by it's own psuedorandom codeword. This psuedorandom codeword is orthogonal to one another. In this way, each user is separated from the others.

Receiver Side:
For detecting the message signal, the receiver needs to know the codeword used by the transmitter.

FHSS (Frequency-Hoping Spread Spectrum) is a method of wireless communications in which the system switches, or hops, between several different frequencies for a specific amount of time.

DSSS (Direct Sequence Spread Spectrum) is a method of wireless communications in which the signal is encoded with extra redundant bits of information that the receiving device can decode to help correct errors.

FCC is federal communication comitee of USA. it is regulatory authority of USA like TRAI  in india.
Its role is to allocate frequencies from RF spectrum (1 HZ- 300 GHZ) and providing licences for different application like TV, mobile communication, satellite communication  etc.,