The primary statutory provision penalising online transmission of obscene material is:
\[
\boxed{Section 67, Information Technology Act, 2000}
\]
Section 67 punishes:
publishing,
transmitting,
causing transmission of
obscene electronic material.
Sub-provisions:
s.67A – sexually explicit material
s.67B – child sexual material
Under the Bharatiya Nyaya Sanhita (BNS), 2023:
\[
Sections 292–294 IPC equivalents survive as BNS provisions on obscenity, but IT Act s.67 remains the special law for online transmission.
\]