Dear Friend,
What is punishment? why you are imposing punishment?..are you imposing any punishment for a dog if it fails to obey? Is the employee is a dog or human...unless you, prima facie feel there is a gravity of offence you can go, and a serious mistake at first warning, disobeyance attracts stringent reprimand, advise, training not to do for the laxity...then you may go for loss of pay provided the situation warrant, you cannot simply punish for serious mistake unless the mistake you as an authority found the work done/service rendered is punishable..ofcourse, if the organisation think so like olden days, it is meaning less to write this...
None can be punished because the way you think is not the way of doing the things by the other ...The Gravity of Offence attract the Punishment.....
best of luck ...