25592 Federal Register / Vol. 73, No. 89 / Wednesday, May 7, 2008 / Rules and Regulations 

PART 25—SATELLITE 

COMMUNICATIONS 

■ 1. The authority citation for part 25 

continues to read: 

Authority: 47 U.S.C. 701–744. Interprets or 

applies Sections 4, 301, 302, 303, 307, 309 

and 332 of the Communications Act, as 

amended, 47 U.S.C. Sections 154, 301, 302, 

303, 307, 309 and 332, unless otherwise 

noted. 

■ 2. Revise paragraphs (a)(2)(iii) and 

(b)(5)(ii) of § 25.149 to read as follows: 

§ 25.149 Application requirements for 

ancillary terrestrial components in the 

mobile-satellite service networks operating 

in the 1.5/1.6 GHz, 1.6/2.4 GHz and 2 GHz 

mobile-satellite service. 

(a) * * * 

(2) * * * 

(iii) In the 1610–1626.5 MHz/2483.5–

2500 MHz bands (Big LEO bands), ATC 

operations are limited to the 1610–

1617.775 MHz, 1621.35–1626.5 MHz, 

and 2483.5–2495 MHz bands and to the 

specific frequencies authorized for use 

by the MSS licensee that seeks ATC 

authority. 

* * * * * 

(b) * * * 

(5) * * * 

(ii) In the Big LEO bands, MSS ATC 

is limited to no more than 7.775 MHz 

of spectrum in the L-band and 11.5 MHz 

of spectrum in the S-band. Licensees in 

these bands may implement ATC only 

on those channels on which MSS is 

authorized, consistent with the Big LEO 

band-sharing arrangement. 

* * * * * 

■ 3. Add paragraph (d) to § 25.254 to 

read as follows: 

§ 25.254 Special requirements for ancillary 

terrestrial components operating in the 

1610–1626.5 MHz/2483.5–2500 MHz bands. 

* * * * * 

(d) To avoid interference to an 

adjacent channel licensee in the 

Broadband Radio Service (BRS), the 

power of any ATC base station emission 

above 2495 MHz shall be attenuated 

below the transmitter power (P) 

measured in watts in accordance with 

the standards below. If these measures 

do not resolve a documented 

interference complaint received from 

the adjacent channel BRS licensee, the 

provisions of § 25.255 shall apply. 

(1) For base stations, the attenuation 

shall be not less than 43 + 10 log (P) dB 

at the upper edge of the authorized ATC 

band, unless a documented interference 

complaint is received from an adjacent 

channel licensee in the BRS. Provided 

that a documented interference 

complaint cannot be mutually resolved 

between the parties, the following 

additional attenuation requirements set 

forth in subsections (2)–(5) shall apply: 

(2) If a pre-existing BRS base station 

suffers harmful interference from 

emissions caused by a new or modified 

ATC base station located 1.5 km or more 

away, within 24 hours of the receipt of 

a documented interference complaint 

the ATC licensee must attenuate its 

emissions by at least 67 + 10 log (P) dB 

measured at 3 megahertz above the edge 

of the authorized ATC band, and shall 

immediately notify the complaining 

licensee upon implementation of the 

additional attenuation. 

(3) If a pre-existing BRS base station 

suffers harmful interference from 

emissions caused by a new or modified 

ATC base station located less than 1.5 

km away, within 24 hours of the receipt 

of a documented interference complaint 

the ATC licensee must attenuate its 

emissions by at least 67 + 10 log (P) ¥20 

log(Dkm/1.5) dB measured at 3 

megahertz above the edge of the 

authorized ATC band, or if both base 

stations are co-located, limit its 

undesired signal level at the pre-existing 

BRS base station receiver(s) to no more 

than ¥107 dBm measured in a 5.5 

megahertz bandwidth and shall 

immediately notify the complaining 

licensee upon such reduction in the 

undesired signal level. 

(4) If a new or modified BRS base 

station suffers harmful interference from 

emissions caused by a pre-existing ATC 

base station located 1.5 km or more 

away, within 60 days of receipt of a 

documented interference complaint the 

licensee of the ATC base station must 

attenuate its base station emissions by at 

least 67 + 10 log (P) dB measured at 3 

megahertz above the edge of the 

authorized ATC band. 

(5) If a new or modified BRS base 

station suffers harmful interference from 

emissions caused by a pre-existing ATC 

base station located less than 1.5 km 

away, within 60 days of receipt of a 

documented interference complaint: 

(i) the ATC licensee must attenuate its 

base station emissions by at least 67 + 

10 log (P) ¥20 log(Dkm/1.5) dB 

measured 3 megahertz above the edge of 

the authorized ATC band, or 

(ii) if both base stations are co-located, 

the ATC licensee must limit its 

undesired signal level at the new or 

modified BRS base station receiver(s) to 

no more than ¥107 dBm measured in 

a 5.5 megahertz bandwidth. 

(6) Compliance with these rules is 

based on the use of measurement 

instrumentation employing a resolution 

bandwidth of 1 MHz or greater. 

However, in the 1 MHz bands 

immediately above and adjacent to the 

2495 MHz a resolution bandwidth of at 

least one percent of the emission 

bandwidth of the fundamental emission 

of the transmitter may be employed. A 

narrower resolution bandwidth is 

permitted in all cases to improve 

measurement accuracy, provided the 

measured power is integrated over the 

full required measurement bandwidth 

(i.e., 1 MHz or 1 percent of emission 

bandwidth, as specified). The emission 

bandwidth is defined as the width of the 

signal between two points, one below 

the carrier center frequency and one 

above the carrier center frequency, 

outside of which all emissions are 

attenuated at least 26 dB below the 

transmitter power. When an emission 

outside of the authorized bandwidth 

causes harmful interference, the 

Commission may, at its discretion, 

require greater attenuation than 

specified in this section. 

* * * * * 

[FR Doc. E8–10095 Filed 5–6–08; 8:45 am] 

BILLING CODE 6712–01–P 

DEPARTMENT OF HOMELAND 

SECURITY 

48 CFR Part 3002 

Homeland Security Acquisition 

Regulation (HSAR); Definitions of 

Words and Terms 

CFR Correction 

In title 48 of the Code of Federal 

Regulations, chapter 29 to end, revised 

as of October 1, 2007, on page 66, in 

3002.101, remove the definition of 

‘‘Organizational Element (OE)’’. 

[FR Doc. E8–10061 Filed 5–6–08; 8:45 am] 

BILLING CODE 1505–01–D 

DEPARTMENT OF COMMERCE 

National Oceanic and Atmospheric 

Administration 

50 CFR Part 660 

Fisheries Off West Coast States 

CFR Correction 

In title 50 of the Code of Federal 

Regulations, part 660 to end, revised as 

of October 1, 2007, on page 194, in part 

660, reinstate § 660.510 to read as 

follows: 

§ 660.510 Fishing seasons. 

All seasons will begin at 0001 hours 

and terminate at 2400 hours local time. 

Fishing seasons for the following CPS 

species are: 


jlentini on PROD1PC65 with RULES