Air carrier Captain reported a discrepancy between flight crew procedures for dangerous goods forms and Dispatch/Operations procedures. After conferring with Chief Pilot; flight departed with the original form.

Narrative

Our first flight of the day. The Operations Agent informed me that there was COMAT onboard that came from ZZZ2 and was continuing on the same aircraft and through-flight on our flight ZZZ to ZZZ1. He also let me know there was a Dangerous Goods Form onboard from the inbound flight; and there it was in the logbook. I specifically remembered from our Hazardous Materials training that a separate Dangerous Goods Form should be generated for each flight and that there was no need for the Captain to place the Dangerous Goods Form in the front of the aircraft logbook for the next Crew Awareness since a new Dangerous Goods Form would be provided for each flight leg. When time permitted I looked it up in the Maintenance Facility XX.XX.X and the first paragraph states that a new Dangerous Goods Form will be provided for each flight leg. I informed the Operations Agent that our manual called for a new Dangerous Goods Form; but he said that his understanding was that if one was onboard that was enough plus he had no way of printing a new one anyway. Maintenance would have to provide it and it would be akin to an act of God that would take an eternity of time for it to be done. I called Dispatch to ask them about the Dangerous Goods Form and the Dispatcher didn't know about that; but did reinforce to me that COMAT was mentioned on the Release. We decided that a conference call to the (Chief Pilot in Operations) was in order and the Chief Pilot felt that the important thing was that a Dangerous Goods Form was onboard for Flight Crew awareness. I told Dispatch that I felt we should file a report to bring awareness to this discrepancy in our manual versus operations.