Which Standards or Codes Should engineers follow : the ones they learned in their countries, or that common in the country they work ?

Standards and Codes that are commonly used in the country that they work in.

they should follow the international codes , and then the ones common in the country where they work. and when there's a contradiction between both codes, the country codes dominate.

the engineers' are follow the national electric code,&ieee

the codes or standards used in the country they are working in (ae British standars or US are mostly used in the uae with some newly added locally made standard).

Standards or codes that are common in the country they work to be followed

that cmmon in the country they work

The standards or codes should engineer follow are metric and Imperial standard

Thanks Engineers For the answers .