Chabad.org — English translation + Rashi
Torah Temimah points to Horayos 10a (unit 4; single primary locus per emergency Core plan).
E-Daf.com — Horayos 10a
HebrewBooks / Shas PDF
English: “When a nasi sins” — excluding a nasi who became a metzora.
Miyut of metzora nasi — a nasi who contracts tzara’at and loses office does not bring the nasi offering for later sins.
A nasi who becomes a metzora is stripped of his office for the duration of the impurity. Any subsequent shegagah is treated as that of a private individual; the special nasi chatas is not brought for sins committed after the loss of status.