Having issued a Lav against working on Yom Kipur in Pasuk 28, why does the Pasuk repeat it here?
Rashi #1: To add a second Lav.
Rashi #2: To include the night of Yom Kipur in the Isur. 1
See Sifsei Chachamim.
What are the implications of "be'Chol Moshvoseichem"?
Seforno: It implies that Yom Kipur applies even in Chutz la'Aretz and nowadays when there are no Korbanos.