What the law requires
Regulation (EC) No 852/2004, Article 5 requires a business to identify its critical control points, such as cooking, and to set critical limits, monitoring, corrective actions and records that fit its size. Annex II, Chapter IX requires food to be protected at every stage against contamination that could make it harmful to health. In the UK, the Food Standards Agency pack Safer food, better business has the same kind of cooking checks. The core temperature limit and how often you measure come from your own HACCP plan and the national guide.
Write the core temperature limit from your HACCP plan at the top of the sheet. It depends on the food and on the rules in your country.