[Creeper]

Although not listed in the Washington reciprocity "states list" provided, I assume you're using the map in your link showing that Texas honors the Washington state permit, combined with this statement in the Washington state law, to arrive at your conclusion.

Washington’s Firearms and Dangerous Weapons statute (RCW 9.41) was amended in 2004 to allow non-Washington residents to carry concealed weapons in Washington if they have obtained a concealed weapons permit from another state that meets certain conditions imposed by Washington’s reciprocity law, RCW 9.41.073. Those conditions are:

1. The other state must have a reciprocal statute allowing Washington residents to carry concealed weapons in the other state if the resident has a Washington concealed pistol permit; and
2. The other state does not issue concealed pistol licenses to persons under twenty-one years of age; and
3. The state requires mandatory fingerprint-based background checks of criminal and mental health history for all persons who apply for a concealed pistol license.

If the above conditions are met, the concealed weapons permit of an out-of-state resident will be recognized in Washington as long as the permit holder does not become a resident of Washington State. Additionally, the permit holder from another state must carry the handgun in compliance with the laws of Washington State*. Washington concealed pistol permits will be recognized in those states which have the reciprocal agreements with Washington. Washington residents should check the laws of the state they are traveling to, in order to comply with the concealed weapons permit law of that state.

So... if the Texas permit requirements meet the Washington State conditions, then the Texas permit would be honored. At least that's how I interpret the statute amendment.

C