The organisation's chief executive Sid Patten said the SSPO was now calling for 100 percent sign-up.
The Code of Good Practice sets out the standards that fish farmers must demonstrate. Compliance is being independently audited.
Mr Patten said: "Salmon farming is making great progress in demonstrating its commitment to good practice and environmental stewardship and a robust and independently audited code is the most flexible and efficient means of achieving a sustainable salmon farming industry."
Martin Gill, executive director of Food Certification (Scotland) Ltd, the independent auditors of the Code, added: "With a large proportion of the industry signed-up to participate, our inspectors are now working full time to complete the first round of on-farm assessments.
"These first assessments will provide an indication of a farm's level of compliance and identify relevant areas in which improvement needs to be implemented. Given the scope and depth of the requirements, my initial impressions on the existing level of compliance being found is very encouraging."
A pdf version of the code is available at www.scottishsalmon.co.uk
TheFishSite News Desk
Salmon farmers sign up to code
UK - The Scottish Salmon Producers' Organisation announced on Tuesday that 95% of the salmon farming industry had signed-up to the Code of Good Practice for Scottish Finfish Culture.
Salmon farmers sign up to code - UK - The Scottish Salmon Producers' Organisation announced on Tuesday that 95% of the salmon farming industry had signed-up to the Code of Good Practice for Scottish Finfish Culture.