Sec. 90.265  Assignment and use of frequencies in the bands 169-172 MHz 
          and 406-413 MHz.

    (a) The following frequencies are available for assignment to fixed 
stations in the Industrial/Business Pool subject to the provisions of 
this section:

                            Frequencies (MHz)

169.425
169.450
169.475
169.500
169.525
170.225
170.250
170.275
170.300
170.325
171.025
171.050
171.075
171.100
171.125
171.825
171.850
171.875
171.900
171.925
406.125
406.175
409.675
409.725
412.625
412.675
412.725
412.775

    (1) The use of these frequencies is limited to transmitting 
hydrological or meteorological data.
    (2) All use of these frequencies is on a secondary basis to Federal 
Government stations and the hydrological or meteorological data being 
handled must be made available on request to governmental agencies.
    (3) Other provisions of this part notwithstanding, an operational 
fixed station operating on these frequencies shall not communicate with 
any station in the mobile service unless written authorization to do so 
has been obtained from the Commission.
    (4) Persons who desire to operate stations on these frequencies 
should communicate with the Commission for instructions concerning the 
procedure to be followed in filing formal application.
    (b) The following frequencies are available for wireless microphone 
operations to eligibles in this part, subject to the provisions of this 
paragraph:

                            Frequencies (MHz)

169.445
171.045
169.505
171.105
170.245
171.845
170.305
171.905

    (1) The emission bandwidth shall not exceed 54 kHz.
    (2) The output power shall not exceed 50 milliwatts.
    (3) The frequency stability of wireless microphones shall limit the 
total emission to within plus-minus32.5 kHz of the assigned 
frequency.
    (4) Wireless microphone operations are unprotected from interference 
from other licensed operations in the band. If any interference from 
wireless microphone operation is received by any Government or non-
Government operation, the wireless microphone must cease operation on 
the frequency involved. Applications are subject to Government 
coordination.

(Secs. 4(i) and 303(r), Communications Act of 1934, as amended, 
Secs. 0.131 and 0.331 of the Commission's Rules and 5 U.S.C. 553 
(b)(3)(B) and (d)())
[49 3 FR 20506 , May 15, 1984, as amended at  62 FR 18929 , Apr. 17, 1997]

    Effective Date Note: At  62 FR 18929 , Apr. 17, 1997, Sec. 90.265 was 
amended by revising the introductory text of paragraph (a), effective 
Oct. 17, 1997.