Sec. 1.223  Petitions to intervene.

    (a) Where, in cases involving applications for construction permits 
and station licenses, or modifications or renewals thereof, the 
Commission has failed to notify and name as a party to the hearing any 
person who qualifies as a party in interest, such person may acquire the 
status of a party by filing, under oath and not more than 30 days after 
the publication in the Federal Register of the hearing issues or any 
substantial amendment thereto, a petition for intervention showing the 
basis of its interest. Where such person's interest is based upon a 
claim that a grant of the application would cause objectionable 
interference under applicable provisions of this chapter to such person 
as a licensee or permittee of an existing or authorized station, the 
petition to intervene must be accompanied by an affidavit of a qualified 
radio engineer which shall show, either by following the procedures 
prescribed in this chapter for determining interference in the absence 
of measurements or by actual measurements made in accordance with the 
methods prescribed in this chapter, the extent of such interference. 
Where the person's status as a party in interest is established, the 
petition to intervene will be granted.
    (b) Any other person desiring to participate as a party in any 
hearing may file a petition for leave to intervene not later than 30 
days after the publication in the Federal Register of the full text or a 
summary of the order designating an application for hearing or any 
substantial amendment thereto. The petition must set forth the interest 
of petitioner in the proceedings, must show how such petitioner's 
participation will assist the Commission in the determination of the 
issues in question, must set forth any proposed issues in addition to 
those already designated for hearing, and must be accompanied by the 
affidavit of a person with knowledge as to the facts set forth in the 
petition. The presiding officer, in his discretion, may grant or deny 
such petition or may permit intervention by such persons limited to a 
particular stage of the proceeding.
    (c) Any person desiring to file a petition for leave to intervene 
later than 30 days after the publication in the Federal Register of the 
full text or a summary of the order designating an application for 
hearing or any substantial amendment thereto shall set forth the 
interest of petitioner in the proceeding, show how such petitioner's

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participation will assist the Commission in the determination of the 
issues in question, must set forth any proposed issues in addition to 
those already designated for hearing, and must set forth reasons why it 
was not possible to file a petition within the time prescribed by 
paragraphs (a) and (b) of this section. Such petition shall be 
accompanied by the affidavit of a person with knowledge of the facts set 
forth in the petition, and where petitioner claims that a grant of the 
application would cause objectionable interference under applicable 
provisions of this chapter, the petition to intervene must be 
accompanied by the affidavit of a qualified radio engineer showing the 
extent of such alleged interference according to the methods prescribed 
in paragraph (a) of this section. If, in the opinion of the presiding 
officer, good cause is shown for the delay in filing, he may in his 
discretion grant such petition or may permit intervention limited to 
particular issues or to a particular stage of the proceeding.

(Sec. 309, 48 Stat. 1085, as amended; 47 U.S.C. )
[28 309 FR 12425 , Nov. 22, 1963, as amended at  29 FR 7821 , June 19, 1964;  41 FR 14872 , Apr. 8, 1976;  51 FR 19347 , May 29, 1986]