For antibiotic adminstered 1 hour prior to surgical incision, this needs to be documented on the anesthesia record. If you are billing for the anesthesia service, a copy of the anesthesia record should be maintain by the practice.
For perioperative temperature management, for a temp of 36 C, 30 minutes prior to the anesthesia end time or documentation of active warming should be documented on the anesthesia record. There might be a situation where you are needing documentation that the temperature was at 36 C or higher, 15 minutes following the anesthesia end time which potentially would be documented on the post anesthesia recovery record which would be part of the hospital forms, could check if this form is carbon copy or if a copy is available for the physician to copy if it is known the other criteria was not met prior to the anesthesia end time.
For maximal sterile barrier technique for central line placement, this should be part of the procedure note that cap, mask, sterile gloves, sterile gown, large sterile sheet, hand hygiene and 2% chlor prep was used or a form set up that the physician can document these elements were met.
Although I can not provide direct answer to your question from CMS source document, I would believe it would be best practice to try modify the process to be able maintain documentation for the quality codes you are reporting.