Prince Mishaal bin Abdulaziz, Chief of Allegiance-Pledge Commission sent today a cable of congratulations to Sultan Qaboos bin Saeed of Oman on the occasion of the 42nd anniversary of the National Day of the Sultanate of Oman. In his cable, Prince Mishaal bin Abdulaziz wished Sultan Qaboos continuous health and happiness and the Omani brotherly people permanent progress and prosperity.