Certification scope and international activities

"If a certification scope covers the activities carried out by the operatives of an international business unit of a parent organisation, must I nominate the countries, or the offices within those countries, in the defined scope (I mean on the certificate)? If my processes are central, does this not then mean that the business unit, wherever its operatives function from, is entirely in scope anyway. Would naming the countries make any geographical mention in the certification scope serve as a preclusive factor rather than an inclusive factor? I’d rather carry out audits and have my certifying body audit remotely based on projects undertaken rather than visit the offices in countries in which my operatives may operate from. Other than possible legislatory variations as the business is run internationally, I don’t see that my certification scope has any real geographical aspect. Do you have any advice?”