Two men were detained with a load of C-4 and TNT on the road linking Beirut to the Bekaa.
The Paris talks covered the southern front and groundwork for a donor conference for the army.
Implementation may slip after Aoun appealed to the Constitutional Council over central bank independence.
The prime minister told the General Assembly that war and peace are decisions for the state alone.
Hezbollah MPs walked out before the vote, which followed two days of debate over the arms monopoly.
The prime minister called a state monopoly on arms essential to sovereignty and economic recovery.
