Pre-natal Diagnostic Techniques (Regulation & Prevention of Misuse) Act, 1994–Secs. 17 & 21–Constitution of India, 1950–Art. 226–Seizure of sonography machine and cancellation of registration–Writ petition against–Maintainability–Though the appeal is provided u/s. 21, yet the procedure for filing the appeal is not prescribed–Writ petition is held maintainable–Further held, the appointment of appropriate authority was not in accordance with the provisions of Sec. 17(2)–Impugned order cannot be sustained.