Here is how the old law read. They changed the Signed agreements area as that is all they had to change to make sure MS could sign agreements if needed for the other state to honor them. You can see how the changed the wording so the first was separated from the second part to make it stand alone.
(19) Any person holding a valid unrevoked and unexpired license to carry stun guns, concealed pistols or revolvers issued in another state shall have such license recognized by this state to carry stun guns, concealed pistols or revolvers, provided that the issuing state authorizes license holders from this state to carry stun guns, concealed pistols or revolvers in such issuing state and the appropriate authority has communicated that fact to the Department of Public Safety.
New Version
(19) Any person holding a valid unrevoked and unexpired 329 license to carry stun guns, concealed pistols or revolvers issued 330 in another state shall have such license recognized by this state 331 to carry stun guns, concealed pistols or revolvers. The 332 Department of Public Safety is authorized to enter into a 333 reciprocal agreement with another state if that state requires a 334 written agreement in order to recognize licenses to carry stun 335 guns, concealed pistols or revolvers issued by this state.