Those conducting the experiment must have adequate training and experience (no specifics are provided, though) and the trial must be randomized, controlled and blinded «to the maximum extent practicable.» (canadianbusiness.com)
Therefore, to the greatest extent practicable and permitted by law, religious observance should be reasonably accommodated in all government activity, including employment, contracting and programming. (christianitytoday.com)
When schools make their own purchases, the Richard B. Russell National School Lunch Act requires them to purchase domestically grown and processed foods, «to the maximum extent practicable.» (thelunchtray.com)