What MOM says on their webpage is basically no industrial sector restriction but there are some jobs you need to get a permission from them.
Speculating, typical restrictions for foreigners include working at the bottom level in food or health service industry but PEP is rather specific so I would expect you can also work as a waiter and the restrictions are more into other issues (i.e. country's security). If you do not fulfill the other restriction of the PEP (salary level etc.) you are permanently out of business in 5y anyway.