Still learning in WVW. How to change tactics?

How do you unlock the tactics in the WvW panel ? I claimed the garrison Keep for another guild, not available for me in OTG and as time progressed certain tactics ( Passive) locked in and the squad leader kept asking me to change them. Is it only officer an that can unlock the tactics . ? Thanks

The guild can set what member rank is allowed to change the tactics. For OTG it is rank Elder and higher.

thanks Neph. I was having a hard timing finding what I needed to know.