Visa rules vary often, and it is best to contact an embassy to ensure that the necessary paperwork is acquired (it is also a good idea to consult one of the approved tour operators in Sana’a). Visas on arrival are no longer available as of January 2010, and residents of most countries (with the potential exception of Gulf Cooperation Council members) need prior visas. The majority of visas are valid for 30 days from the date of issuance (3 months for European Union, but sometimes it depends on the mood of the official dealing with you). Another option for obtaining a visa is via a licensed tour operator, as they are permitted to submit pre-visa papers at the Ministry of Foreign Affairs for its customers. Such pre-visa document is valid for 30 days from the date of issuance, after which a genuine visa is granted at Sana’a International Airport. Yemeni authorities stopped all visa-on-arrival services at all Yemeni ports on January 21, 2010. This step was done in order to reduce the danger of terrorism in Yemen.