Via the BBC after the Pakistani parliamentary debate on joining the coalition:
The parliament of Pakistan expresses serious concern on the deteriorating security and humanitarian situation in Yemen and its implications for peace and stability of the region...[It] desires that Pakistan should maintain neutrality in the Yemen conflict so as to be able to play a proactive diplomatic role to end the crisis.
Note the caveat:
Friday's resolution backed the Pakistani government's commitment to protect Saudi territorial integrity and Islamic holy places located inside the kingdom.
Link:http://www.bbc.co.uk/news/world-asia-32246547

WaPo notes:
Under Pakistan’s constitution, the resolution is non-binding, because the prime minister has complete authority over the country’s armed forces. But Prime Minister Nawaz Sharif said this week he planned to leave the matter up to parliament.
Link to a slightly longer report:http://www.washingtonpost.com/world/...f6a_story.html