# 47 C.F.R. § 73.683 (2026): Presumptive determination of field strength at individual locations > Federal · Regulations · In force URL: https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_683 ## Section - **Citation:** 47 C.F.R. § 73.683 (2026) - **Heading:** Presumptive determination of field strength at individual locations - **Jurisdiction:** Federal - **Kind:** Regulations - **Status:** In force - **Text as of:** August 14, 2026 - **Source:** Compiled text - **Location:** Title 47 CFR: Telecommunication / Chapter I: FEDERAL COMMUNICATIONS COMMISSION / Part 73: RADIO BROADCAST SERVICES / Subpart E: Television Broadcast Stations / § 73.683: § 73.683 Presumptive determination of field strength at individual locations. ## Text (a) See § 73.619(c). For purposes of the cross-reference from § 90.307(b), the Grade B contour is defined as the F(50,50) contour at 64 dBu. (b) - (c) [Reserved] (d) For purposes of determining the eligibility of individual households for satellite retransmission of distant network signals under the copyright law provisions of 17 U.S.C. 119(d)(10)(A), field strength shall be determined by the Individual Location Longley-Rice (ILLR) propagation prediction model. Such eligibility determinations shall consider only the signals of network stations located in the subscriber's Designated Market Area. Guidance for use of the ILLR model in predicting the field strength of television signals for such determinations is provided in OET Bulletin No. 73. For availability of OET Bulletin No. 73, contact FCC (see § 73.8000 for contact information). (e) If a location was predicted to be unserved by a local network station using a version of the ILLR model specified in OET Bulletin No. 72 or OET Bulletin No. 73, as appropriate, and the satellite subscriber at that location is receiving a distant signal affiliated with the same network from its satellite provider, the satellite subscriber shall remain eligible for receiving the distant signal from its satellite provider if that location is subsequently predicted to be served by the local station due to either a change in the ILLR model or a change in the station's operations that change its coverage. at that location is receiving a distant signal affiliated with the same network from its satellite provider, the satellite subscriber shall remain eligible for receiving the distant signal from its satellite provider if that location is subsequently predicted to be served by the local station due to either a change in the ILLR model or a change in the station's operations that change its coverage. (f) A satellite carrier is exempt from the verification requirements of 47 U.S.C. 339(c)(4)(A) with respect to a test requested by a satellite subscriber to whom the retransmission of the signals of local broadcast stations is available under 47 U.S.C. 338 from such carrier. The definitions of satellite carrier, subscriber, and local market contained in 47 CFR 76.66(a) apply to this paragraph (f). [44 FR 36039, June 20, 1979, as amended at 47 FR 35990, Aug. 18, 1982; 50 FR 23699, June 5, 1985; 50 FR 32416, Aug. 12, 1985; 65 FR 36641, June 9, 2000; 70 FR 21670, Apr. 27, 2005; 75 FR 80363, Dec. 22, 2010; 85 FR 64408, Oct. 13, 2020; 88 FR 21446, Apr. 10, 2023; 89 FR 7252, Feb. 1, 2024] ## Nearby sections - [47 C.F.R. § 73.601 (2026) § 73.601 Scope of subpart.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_601.md) - [47 C.F.R. § 73.602 (2026) § 73.602 Cross reference to rules in other parts.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_602.md) - [47 C.F.R. § 73.603 (2026) § 73.603 Numerical designation of television channels.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_603.md) - [47 C.F.R. § 73.606 (2026) § 73.606 Table of allotments.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_606.md) - [47 C.F.R. § 73.609 (2026) § 73.609 Zones.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_609.md) - [47 C.F.R. § 73.611 (2026) § 73.611 Emission levels and mask filter.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_611.md) - [47 C.F.R. § 73.612 (2026) § 73.612 Protection from interference.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_612.md) - [47 C.F.R. § 73.614 (2026) § 73.614 Power and antenna height requirements.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_614.md) - [47 C.F.R. § 73.616 (2026) § 73.616 References to TV station interference protection methodology.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_616.md) - [47 C.F.R. § 73.617 (2026) § 73.617 Interference protection of other services.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_617.md) - [47 C.F.R. § 73.618 (2026) § 73.618 Antenna location and principal community coverage.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_618.md) - [47 C.F.R. § 73.619 (2026) § 73.619 Contours and service areas.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_619.md) - [47 C.F.R. § 73.620 (2026) § 73.620 Interference calculation and protection of TV broadcast services.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_620.md) - [47 C.F.R. § 73.621 (2026) § 73.621 Noncommercial educational TV stations.](https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_621.md) --- Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T47_P73_S73_683. 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