Time is running out to amend the law, as voting is due to begin May 29. Some Christian lawmakers have suggested delaying the general election, but the prime minister, Najib Mikati says it will be held on time.
The electoral law was written five years ago under Syrian influence, and some charge it was designed to win Damascus more allies in Lebanon's parliament.
Under strong Lebanese and international pressure, Syria last month ended its military and intelligence presence in Lebanon after the February assassination of former Lebanese Prime Minister Rafik Hariri.
Friday, the United Nations appointed a leading German prosecutor, Detlev Mehlis to head an international investigation into Mr. Hariri's murder.
Some information for this report provided by AFP, AP and Reuters.