i got a website for you ,maybe it's helpful for you.

http://www.ccohs.ca/oshanswers/legisl/msds_prep.html

Thank you, Shouqin Liu, that website did provide useful information. Basically, "using professional judgement, the product is classified according to the hazard criteria specified in legislation of the country where the product will be used...The Controlled Products Regulations (WHMIS) regulations also prescribe what elements of information must be on labels and MSDSs for WHMIS-controlled products. The supplier must use professional, scientific judgement when evaluating the test results of the product or, where appropriate, a product with similar properties. The supplier also has the duty to report any hazard information of which he or she is "aware or ought reasonably to be aware" [see subsections 12(11) and 33(2) of the CPR]. The toxicology information must be presented in such a way "so as not to mislead a person as to the nature or extent of the hazard posed by the controlled product" [subsection 13.1]."

So that essentially answers my question.

Additionally, I recommend you visit the following website (European Union). It is very interesting and practical:

http://echa.europa.eu/regulations/reach/safety-data-sheets;jsessionid=88A43AF5B743B4AC212FEBFED2C19C9D.live1

Akron university also has valuable MSDS for material .the data that  they considered are complete. pLS. known that in MSDS all data as helath /safety/enviromental effect shall be icluded. The personals requirement for working with material and physical and chemical data of them is one of major require ddata.

Simple answer is include as much as information available. They might be useful at some point.