TT #62 · Parshas Tazria · Aliyah 1 · Passuk 2
English: When a person has on the skin of the body a swelling, a rash, or a discoloration, and it develops into a scaly affection on the skin of the body, it shall be reported to Aaron the priest or to one of his sons, the priests.
Chabad.org — Chumash, English translation + Rashi for Vayikra 13:2
Torah Temimah cites Horayos 10a for the phrase “when there is” as referring to the period beginning with the giving of the Torah.
E-Daf — Horayos 10a · Shas.org · Sefaria — Horayot 10a, source text and translation
English: “When there is” — from the giving of the Torah onward.
Temporal limitation
The Sifra reads the phrase “when there is” as referring to the period beginning with the giving of the Torah, not as an unrestricted reference to any time.