George Quick discusses maritime security from the viewpoint of maritime labor. He notes that while maritime labor supports ship and port security as envisioned by the IMO's ISPS Code, there are concerns that an overemphasis on security could restrict the rights of seafarers. The ISPS Code recognized this potential conflict and included provisions to protect the rights and freedoms of maritime workers. However, some governments are not adhering to these provisions regarding shore leave and access to port facilities. Further guidance from the IMO in 2004 emphasized the need to balance security with protecting seafarers' human rights. The lack of a universally accepted seafarer identity document and some countries' visa requirements also present challenges.