Religious Head-Covering for Men in Pachomius's Rule

I have rarely seen religious proscriptions for men to cover their head, so it's always noteworthy to find a new one . . .

"When coming from the sinaxis, the brothers, who are leaving one by one, to their cells or to the refectory, will meditate about any passage of Scripture and no one will have their heads covered when they meditate.
      And when they had come to the refectory, they will sit by order of the places that have been given and will cover 
their head."