Hassan II of Morocco Sultan to King in 1957. Hassan was proclaimed Crown Prince on 19 July 1957, and became King on 26 February 1961, after his father's death. Hassan's conservative rule, one characterized by a poor human rights record, strengthened the Alaouite dynasty. In Morocco's first constitution of 1963, Hassan II reaffirmed Morocco's choice of a multi-party political system, the only one in the Maghreb at that time. The constitution gave the King large powers he eventually used to strengthen his rule, which provoked strong political protest from the UNFP and the Istiqlal parties that formed the backbone of the opposition. In 1965,
Khaled al-Hassan members, Hassan was one of them. In 1968, al-Hassan was elected to the Palestine Liberation Organization Executive Committee (PLO-EC) after Fatah took control of the Palestine Liberation Organization (PLO) in 1968. Early that year, al-Hassan persuaded Saudi King Faisal to enforce the "liberation tax" which required Palestinians in that country to pay a percentage of their income to the PLO. This, in turn, supplied the PLO with 60 million riyal yearly. Also, in that year, he spoke to the Egyptian Foreign Minister Mahmoud Riyad and Mohammad Hassanein Heykal on behalf of Gamal Abdel Nasser in order to familiarize him with