Professor Lester L Grabbe argues that there was no decree but that there was a policy that allowed exiles to return to their homelands and rebuild their temples.
The family's return follows the death this year of King Hassan II, whose son Muhammad VI has taken steps to allow prominent exiles to return.
They included the repeal of apartheid laws, allowing exiles to return home and opening negotiations including movements like the African National Congress and the Pan-Africanist Congress.
He also released political prisoners, allowed exiles to return and declared all nationals equal.
In Guatemala, the accord has led the Government to meet with leftist rebel representatives and to begin efforts to allow political exiles to return.
He freed political prisoners and allowed exiles to come back to Greece, reduced income tax and the defence budget, and increased spending on social services and education.
Paraguay experienced a brief period of openness as Moríñigo relaxed restrictions on free speech, allowed political exiles to return, and formed a coalition government.
A general amnesty was granted allowing political exiles to return freely.
We need a comprehensive discussion of all the issues, from allowing exiles to return through to the wall.
To move too quickly, the officials argued, would allow Pentagon-backed exiles like Ahmad Chalabi of the Iraqi National Congress, to gain undue influence, to the exclusion of candidates from inside the country.