Like the title says: Is it OK to collect seaweed from NSW beaches for personal use (as compost, mulch, homemade seaweed solution etc)?
This link:
http://www.dpi.nsw.gov.au/__data/assets/pdf_file/0003/365844/Section-37-Permit-Marine-Veg-for-Commercial-Purposes-Information-Kit-12V1.pdf Suggests that it is so long as it's outside of any marine or national parks, aquatic reserves, RAMSAR wetlands or other protected zones, is dead/unattached and is less that 20kg per day (way more than I would need).
My council doesn't seem to say anything about it either way.