Adding our fuel to HF position reports complies with our Ops Specs for "flight following." Oceanic will forward the info we give them in the position report to our company...it's a standing request. If we were not able to do that, we would have to make an additional report to cover that requirement.
I do not see any reference for the requirement to report fuel. In fact, it would likely be fruitless to report fuel if your company did not have an agreement with Oceanic to forward those reports.
This link might be of assistance:
http://www.nat-pco.org/nat/MNPSA/MNPSA_2005.pdf
Standard Message Types
6.3.8 Standard air/ground message types and formats are used within the NAT Region and are
published in State AIPs and Atlantic Orientation charts. To enable ground stations to process messages in
the shortest possible time, pilots should observe the following rules:
(1) use the correct type of message applicable to the data transmitted;
(2) state the message type in the contact call to the ground station or at the start of the message;
(3) adhere strictly to the sequence of information for the type of message;
(4) all times in any of the messages should be expressed in hours and minutes UTC.
6.3.9 The message types are shown below with examples:
POSITION
Example: “Position, Swissair 100, on 5649, 56 North 010 West at 1235, Flight Level 330, Estimating
56 North 020 West at 1310, 56 North 030 West Next”