1)
What is "Melachah ha'Chitzonah"?
1.
'Rashi', Radak: It is work done outside the city, in forests and mountains, to cut cedar trees, quarry rocks and plow Hekdesh fields.
2)
Why does it say "Al Yisrael l'Shoterim v'Shofetim"?
1.
Redak: Every year, Yisraelim voluntarily gave to Hekdesh from their grain and Peros. These were appointed to be enforcers and judges over those appointed under them, to gather and bring the donations to Beis Hashem.
