| Regulation | Main Provisions | Impact on PDFs | |------------|----------------|----------------| | (1907) | Prohibits the distribution of “obscene” material; requires pixelation of genitalia. | PDF files must retain mosaics; many publishers use software that automatically applies the required pixelation before export. | | Act on Regulation of Transmission of Specified Electronic Mail (2002) | Controls unsolicited adult e‑mail; mandates clear labeling. | PDF distributors must label files as “Adult Content” and provide opt‑out mechanisms for email marketing. | | Copyright Law (1970, revised 2020) | Protects creators’ exclusive rights; allows limited “fair use” for research. | Sharing PDFs without permission is illegal, though academic citation of short excerpts may be permissible under research exemptions. |