Heres where Amber/devin won HOH (scroll halfway down) it says and I quote
Amber: Ok.. Nominations. "This is one of the most critical aspects of your Head of Household role. You are each required to nominate 2 houseguests for eviction. On the day of nominations, we will walk you through the nomination process and ceremony. You can't confirm to the nominees, before the nomination process, that you are nominating them. You cannot reveal your nominations to the other HoH or houseguests prior to the nomination ceremony. When a lockdown in announced, it is your responsibility to make sure all houseguests cooperate and move quickly to the lockdown area."
