Section 61.159: Aeronautical experience: Airplane category rating.
(a) Except as provided in paragraphs (b), (c), and (d) of this section, a person who is applying for an airline transport pilot certificate with an airplane category and class rating must have at least 1,500 hours of total time as a pilot that includes at least: 
(1) 500 hours of cross-country flight time. 
(2) 100 hours of night flight time. 
(3) 75 hours of instrument flight time, in actual or simulated instrument conditions, subject to the following: 
(i) Except as provided in paragraph (a)(3)(ii) of this section, an applicant may not receive credit for more than a total of 25 hours of simulated instrument time in a flight simulator or flight training device.