FEDERAL COMMUNICATIONS COMMISSION
ENFORCEMENT BUREAU
WESTERN REGION
Los Angeles Office
18000 Studebaker Rd, #660
Cerritos, CA 90703
562-860-7474
October 31, 2013
Leon Krous
Leon Krous Drilling
Sylmar, California  91342
NOTICE OF UNLICENSED OPERATION
Case Number:  EB-FIELDWR-13-00011681
Document Number:  W201432900001
The Los Angeles Office received a complaint concerning harmful interference being caused to 
the licensed Beverly Hills Police Department radio communication system on 458.525 MHz.  On 
October 4, 2013, an agent of the Los Angeles Office determined by direction finding techniques 
that a radio signal on the frequency 458.525 MHz was emanating from a construction site located 
at 141 N Clark Drive in Hollywood, California. You are identified as the Drilling Contractor for 
this construction site.  A wireless device manufactured by Cavotec controlling drilling machinery 
was found to be the source of the harmful emission.  The Commission’s records show that no 
license was issued for operation on 458.525 MHz in the Los Angeles metro area other than the 
Beverly Hills Police Department.  
Radio stations must be licensed by the FCC pursuant to 47 U.S.C. § 301.  The only exception to 
this licensing requirement is for certain transmitters using or operating at a power level that 
complies with the standards established in Part 15 of the Commission’s rules, 47 C.F.R. §§  15.1 
et seq.  The field strength of the signal on frequency 458.525 MHz exceeded the maximum 
permitted level of 200 microvolts per meter (µV/m) at 3 meters for non-licensed devices.  Thus, 
this station is operating in violation of 47 U.S.C. § 301.  An FCC license is required for operation 
of the device in question.
You are hereby warned that operation of radio transmitting equipment without a valid radio 
station authorization constitutes a violation of the Federal laws cited above and could subject the 
operator of this illegal operation to severe penalties, including, but not limited to, substantial 
monetary forfeitures, in rem arrest action against the offending radio equipment, and criminal 
sanctions including imprisonment.  (see 47 U.S.C. §§ 401, 501, 503 and 510).
UNLICENSED OPERATION OF THIS RADIO STATION MUST BE DISCONTINUED 
IMMEDIATELY.
You have ten (10) days from the date of this notice to respond with proof of your license or 
authority to operate granted by the FCC.  Your response should be sent to the address in the 
letterhead and reference the listed case and document number.  Under the Privacy Act of 1974, 5 
U.S.C. § 552a(e)(3), we are informing you that the Commission’s staff will use all relevant 
material information before it to determine what, if any, enforcement action is required to ensure 
your compliance with FCC Rules.  This will include any information that you disclose in your 
reply.  In the reply, also identify the company and contact person of where the device was 
purchased.  
You may contact this office if you have any questions.
Charles A. Cooper
District Director 
Los Angeles Office
Attachments:
Excerpts from the Communications Act of 1934, As Amended
Enforcement Bureau, “Inspection Fact Sheet,” March 2005