Not correct. Though it probably won't be called much. From a WaPo piece on the rule change:
The rule potentially applies not only to a defender hitting an offensive player, but also to a ball carrier initiating contact with a defender and also to a blocker. But much depends on how the rule is enforced. A previous restriction disallowing hits delivered with the crown of the helmet seldom was called in games. Some of those familiar with the deliberations behind this rule said they expect it to be applied mostly in open-field situations in which the lowering of the head is obvious and blatant. They said they expect penalties to be relatively infrequent and ejections to be extremely rare.