Helping disabled wife and the law? Rest area sign.

Never thought I would be in this position but I am...wife needs help getting out of wheel chair and onto the toilet. Then off the toilet and back in her wheel chair.

At the hospitals, usually we can find a bathroom that has only one toilet in it and lots of room. No problems.

But sometimes we have to use restrooms that have maybe one or two handicap stalls and multiple regular stalls. I help her out of wheel chair then onto toilet. If there is enough room for me and her wheel chair I just wait in stall with her. And when not enough room in the stall I leave and when she is ready she calls me on my phone to come get her, to transfer from toilet back to wheel chair.

Last Fri at a hosp we've never been to before, a lady saw me in the women's room and went nuts calling me all kinds of stuff, was so happy to give my ears a break when she was going to get security.

My question....At rest stops on the freeway especially WA state I've seen signs saying to the effect that it is...

OK for the opposite to assist someone in the rest room.

Does anybody know that law and where to find it. I've looked and can't find it. I would like to carry a copy for the next time, just in case.

Any other info would be helpful.

Thanks