FCC Rules and Regulations 47 C.F. R. 22.371

     Sec.  22.371   Disturbance of AM broadcast station antenna patterns.

   Public Mobile Service licensees that construct or modify towers in the
   immediate vicinity of AM broadcast stations are responsible for measures
   necessary to correct disturbance of the AM station antenna pattern which
   causes operation outside of the radiation parameters specified by the FCC
   for  the  AM  station, if the disturbance occurred as a result of such
   construction or modification.

   (a) Non-directional AM stations. If tower construction or modification is
   planned within 1 kilometer (0.6 mile) of a non-directional AM broadcast
   station tower, the Public Mobile Service licensee must notify the licensee
   of  the AM broadcast station in advance of the planned construction or
   modification.  Measurements  must  be  made  to  determine whether the
   construction or modification affected the AM station antenna pattern. The
   Public Mobile Service licensee is responsible for the installation and
   continued maintenance of any detuning apparatus necessary to restore proper
   non-directional performance of the AM station tower.

   (b)  Directional AM stations. If tower construction or modification is
   planned  within 3 kilometers (1.9 miles) of a directional AM broadcast
   station array, the Public Mobile Service licensee must notify the licensee
   of  the AM broadcast station in advance of the planned construction or
   modification.  Measurements  must  be  made  to  determine whether the
   construction or modification affected the AM station antenna pattern. The
   Public Mobile Service licensee is responsible for the installation and
   continued maintenance of any detuning apparatus necessary to restore proper
   performance of the AM station array.

• This Regulation applies to all telecommunication facilities.
• The coordination distances are different than the broadcast regulation 73.154.
• The coordination distances are 1.0 kilometers for non-directional broadcast stations and 3.0 kilometers for directional broadcast stations.
• The regulation specifies that only "measurements" are required to demonstrate that no interference has occured.  There is no requirement for Partial Proof of Performance measurements as there is in 73.154.
• Detuning is only required is there is an impact on the the radio satation's pattern.  Detuning is not required if the radio station "wants" or "demands" it.
• The best approach is to read and follow the regulation as written-do not attempt to read something into the regualation that is not there.