Section 6.4. Regulatory Approvals. 

(a) Notwithstanding anything to the contrary contained in this Agreement, each Party will (and, in the case of Parent, cause each of its Subsidiaries and Affiliates (collectively, the “Parent Group”) to) use its best efforts to take, or cause to be taken, all actions and to do, or cause to be done, all things necessary, proper or advisable under applicable Laws and regulations to consummate the Merger and the other transactions contemplated by this Agreement. (Page 58)

Section 6.4. Regulatory Approvals.  <omitted> (d) Notwithstanding anything to the contrary set forth in this Agreement, and in furtherance and not in limitation of the foregoing, Parent shall, and shall cause its Affiliates and Subsidiaries to, take any and all steps that are (i) necessary or (ii) identified or requested (whether formally or informally) by the FTC, the DOJ, or any Governmental Entity to (x) resolve, avoid, or eliminate impediments or objections, if any, that may be asserted with respect to the transactions contemplated by this Agreement or the Subsequent Transaction under any Antitrust Law or in connection with any Healthcare Regulatory Approval or (y) avoid the entry of, effect the dissolution of, and have vacated, lifted, reversed or overturned, any decree, order or judgment that would prevent, prohibit, restrict or delay the consummation of the transactions contemplated by this Agreement, so as to enable the Parties to close the contemplated transactions expeditiously (but in no event later than the End Date). Without limiting the generality of the foregoing, Parent shall, and shall cause its Affiliates and Subsidiaries to, (i) propose, negotiate, commit to and effect, by consent decree, hold separate orders or otherwise, the sale, divesture, disposition, or license of any assets, properties, facilities, clinics, products, rights, services or businesses of Parent, Parent’s Subsidiaries, Parent’s Affiliates, or the Company or its Subsidiaries or any interest therein, or agree to any other structural or conduct remedy, (ii) otherwise take or commit to take any actions that would limit Parent’s, Parent’s Subsidiaries, Parent’s Affiliates, or the Company’s or its Subsidiaries’ freedom of action with respect to, or its or their ability to retain or sell any assets, properties, facilities, clinics, products, rights, services or businesses of Parent, Parent’s Affiliates, or the Company or its Subsidiaries or any interest or interests therein, (iii) otherwise commit to take any actions that would limit Parent’s, Parent’s Subsidiaries, or Parent’s Affiliates (or, with respect to any period after the Closing Date, the Company’s or its Subsidiaries’) freedom of action with respect to, or its or their ability to acquire, any assets, properties, facilities, clinics, products, rights, services or businesses of any other entity or third party (other than the Company), including the Subsequent Transaction Buyer; and (iv) modify, restructure, amend, terminate, or revise, any agreement or arrangement entered into or proposed to be entered into by Parent or Parent’s Affiliates or to which Parent or Parent’s Affiliates are a party, including with respect to the Subsequent Transaction or any Financing, in connection with the transactions contemplated by this Agreement; provided, that the Parties shall not be obligated to take any action with respect to the Company the effectiveness of which is not conditioned on the Closing occurring. For the avoidance of doubt, Parent’s obligations under this Section 6.4(d) are an absolute commitment not subject to the best efforts applicable to the remainder of the obligations set forth in this Section 6.4. (Page 59)

Question: General Antitrust Efforts Standard
Category: Operating and Efforts Covenant
Answer: Flat standard