Don't tie it in with an ID. Anyone with a roleplay reason to access the gate should be able to obtain a pass, weather it be through legit means or illicit means. For example Tenabaras (sp?), an order ship, would be given one by the LN or a smuggler could buy one off the black market to use for cardi and slave smuggling. Plus if there is someone who needs to get in only once they can group and form with someone who has access and follow him through. To me it allows for much more roleplay than leaving it as is.
By the way this is coming from someone who has no Liberty lawful characters.