of General Services shall ensure that each location to which detainees are first transported after an initial encounter has onsite at least one licensed medical professional to conduct health screenings. Other personnel that are or may be necessary for carrying out the functions described in subsection (e), such as licensed emergency care professionals, specialty physicians (including physicians specializing in pediatrics, family medicine, obstetrics and gynecology, geriatric medicine, internal medicine, and infectious diseases), nurse practitioners, other nurses, physician assistants. licensed social workers, mental health professionals, public health professionals, dieticians, interpreters, and chaperones, shall be located on site to the extent practicable, or if not practicable, shall be available on call. (k) Ethical guidelines The Commissioner shall ensure that all medical assessments and procedures conducted pursuant to this section are conducted in accordance with ethical guidelines in the applicable medical field, and respect human dignity. 3. Water, sanitation, and hygiene The Commissioner shall ensure that detainees have access to— (1) not less than 1 gallon of drinking water per person per day, and age-appropriate fluids as needed