Complex sentence: The number of members of the parliament may range between 52 and 65; it started with 88 members, due to the Constituent Assembly's decision to reform as the National Parliament rather than holding new elections.
Split into simpler sentences: The number of members of the National Parliament may range between 52 and 65. Initially, when still named the Constituent Assembly, the parliament had 88 members due to the decision to reform as the National Parliament rather than holding new elections.