If needed, can the pile be “re-heated” to ensure the destruction of weed seeds?
Assuming that you have gone through a high-heat cycle and are in the curing phase, the pile temperatures will not come up again because there is not sufficient “food value” for the microorganisms. However, if you were to mix your compost with grass clippings (lots of nitrogen) at a 50:50 ratio, then you may be able to regain the heat needed to destroy the weed seeds.