The Secret of Yavin 4

OFFICIAL ERRATA 

Should read: ''“Reaction: After 1 of your other objectives is engaged, your opponent engages this objective instead. (Limit once per turn.)”''

ASK FANTASY FLIGHT 

Q: If I declare an engagement against The Secret of Yavin 4 first and later engage another objective, can the LS player still use the interrupt on The Secret of Yavin 4?

A: One engagement can be declared against each objective. Using Secret of Yavin 4 does not change which objective was declared against, it only changes which objective the engagement resolves against. So if you declare against Objective #1, and it gets moved to Secret of Yavin 4, you have still used your declaration against Objective #1, and cannot declare against Objective #1 again. You can still declare your next engagement against Secret of Yavin 4, as you have not yet declared against it this turn.