Thats not the definition of the responsible person though, to where a notice would be served.
The company secretary is not a responsible person.
If it is a limited company all notices and enforcement action will be taken against "bodies corporate"
The correspondance relating to bodies corporate is ADDRESSED to the company secretary so that it lands on his or her desk - but it wouldn't necessarily be the company secretary in the dock if something went to court.
The Company Secretary ensures that an organisation complies with relevant legislation and regulation, and keeps board members informed of their legal responsibilities.
Company Secretaries are the company’s named representative on legal documents, and it is their responsibility to ensure that the company and its directors operate within the law.