Complex sentence: Prior to his ascension to the leadership post of the Christian Democratic National Peasants Party in 2001, Marga had only joined the party in 1999, two years before, however party rules prohibited members with less than 5 years in the party from running for party president.
Split into simpler sentences: Prior to his ascension to the leadership post of the Christian Democratic National Peasants Party in 2001, Marga had only joined the party in 1999, two years before. However party rules prohibited members with less than 5 years in the party from running for party president.