A proposal to mandate by law a standard for personnel airlocks and docking mechanisms for all space-going vehicles.
1) Powerless operation. No electricity is needed to open airlocks or to dock with another ship.
2) Simple mechanical usage. An idiot should be able to open the the door and enter
the ship without loss of cabin pressure.
3) Mechanical overrides. Both docking and airlock operations should be designed to be operated by crude mechanical means. This means the parts need to be durable and have large gripping surfaces. It allows for automation of docking procedures without making automation required.
4) All operations are documented in bright paint on the side of the ship in universal symbols.
The benefit is that a Russian party boat that lost fusion power and is drifting towards Titan can be rescued by Chinese, Portugese, or even Canadians.
If an Italian goes out spacewalking on his German lover's ship and develops vertigo while gazing at the stars, he should have a fair chance at returning through the airlock, even if the German partner is passed out on the couch.
Space Firefightering Ships would have robotic door openers which would utilize the mechanical assistance properties of the door to allow for speedy ingress.
Additionally civilian research vehicles could be robotized, yet still remain accessible to anyone, for instance if you are passing Jupiter and your space heater broke, and the only vehicle within any range is a semi-autonomous Europan exporer vehicle, you can dock with that vehicle and either use spare parts to repair your ship, or use the explorer ship to tow your ship back to Mars.
You don't get second chances in space. Access to all human-survivable environments in space should be easy, no matter how drunk, stoned, robotic, or foreign you are.