1. Short title; table of contents (a) Short title This Act may be cited as the Synthetics Trafficking and Overdose Prevention Act of 2018 or STOP Act of 2018 . (b) Table of contents The table of contents for this Act is as follows: Sec. 1. Short title; table of contents. Sec. 2. Customs fees. Sec. 3. Mandatory advance electronic information for postal shipments. Sec. 4. International postal agreements. Sec. 5. Cost recoupment. Sec. 6. Development of technology to detect illicit narcotics. Sec. 7. Civil penalties for postal shipments. Sec. 8. Report on violations of arrival, reporting, entry, and clearance requirements and falsity or lack of manifest. Sec. 9. Effective date