From the Comprehensive Rules 4.0:
During each of your turns, your fellowship must move once, and may move a number of times up to your move limit.
In a two- or three-player game, your move limit is two. In a game with four or more players, your move limit is equal to the number of your opponents when the game begins. During your regroup phase, you may decide to move your fellowship again, subject to this move limit.
Move limit modifiers last the entire turn; the effect lasts throughout the turn even if the card providing the modifier is discarded.