They changed the rule recently ............
It's not a silly question at all and don't feel shy for this. I am sure, Ul Haq doesn't know that, unlike you, he is PAK's CS - hence he has sent 1 WK in a 16 member squad with 8 games in 3 weeks. 16 years back, he took a Test match to Day 5 for 15 minutes, despite 80% chance of thunderstorm (actually haven opened few minutes after PAK wrapped the chase), because PAK Captain didn't know the 30 minutes extension rule (a playing condition, that he must have signed off as Captain of the touring side).