[aprssig] Tactical call signs

[John Habbinga]

> Please explain the violation (and please cite Part 97).

Sec. 97.219 Message forwarding system
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(a) Any amateur station may participate in a message forwarding system, 
subject to the privileges of the class of operator license held.

(b) For stations participating in a message forwarding system, the control 
operator of the station originating a message is primarily accountable for 
any violation of the rules in this part contained in the message.

(c) Except as noted in (d) of this section, for stations participating in a 
message forwarding system, the control operators of forwarding stations that 
retransmit inadvertently communications that violate the rules in this part 
are not accountable for the violative communications. They are, however, 
responsible for discontinuing such communications once they become aware of 
their presence.

(d) For stations participating in a message forwarding system, the control 
operator of the first forwarding station must:

  (1) Authenticate the identity of the station from which it accepts 
communications on behalf of the system; or

  (2) Accept accountability for any violation of the rules in this part 
contained in messages it retransmits to the system.