All ALPA contracts are "closed shop". That means you still have to pay dues, even if you're a non member. And its legal under the RLA.

Furthermore, the snipped of the RLA you googled/cut/pasted is totally not applicable to the topic at hand. That means the company can't interfere in union drives and elections. It says nothing about negotiating contract provisions to only hire from ALPA carriers (far fetched, but legal).

Wish I had a buck for all the armchair attorneys out there who think they have all the answers thanks to google.