It should include the name of the project, the people involved and those who will be held accountable for whatever may occur. It should also have an introduction to the plan, the scope of the plan, policies to be followed, the officers involved, the need_to_know for workers in the site of work, details of accident or illness, inspection dates, an appendix for the documents that will be attached and whatever else is deemed necessary.
There are plenty of documents that you should include in your policies and procedures for your business. The safety plan is just one of them. You should also consider the amount of detail you should include in these policies. It makes sense to have enough detail in these documents and also make them easy to read. After all, who wants to read a massive unformatted document of text? Not many people will and not many people have the time. Therefore it makes perfect sense to ensure the document is easy to read, relevant and gives the reader the information they need to keep them informed.