The correct answer is: A. SSE/P.way
The competency certificate of the gateman of interlocked engineering gate is issued by the Section Engineer (P.way). The Section Engineer (P.way) is responsible for the maintenance and operation of the railway track and its associated infrastructure, including the interlocking system. The interlocking system is a safety system that prevents trains from colliding by ensuring that only one train can be on a section of track at a time. The gateman is responsible for operating the interlocking system and ensuring that trains are safe to pass through the gate.
The Section Engineer (P.way) is the most qualified person to issue the competency certificate of the gateman of interlocked engineering gate because they have the knowledge and experience to assess the gateman’s skills and knowledge. The Section Engineer (P.way) is also responsible for ensuring that the gateman is properly trained and qualified to operate the interlocking system.
The other options are incorrect because they are not responsible for the maintenance and operation of the railway track and its associated infrastructure.