I had to read your quote about twenty times to figure out exactly what you mean. Your English is terrible. I only mention it because your profile says that you are in Colorado. If you were writing a policy in a different language then that would be different. Presumably you are writing a policy in English. If your corporate documentation is in English then you are the last person that should be contributing to it.
And you aren't even taking data encryption into account. Here are a couple of ideas to get you started.
Any laptop computer that contains sensitive information must encrypt that information such that it cannot be accessed by unauthorized parties. Further, you must log out when the computer is not being used and you must use a password protected screen saver.
Any computer that contains sensitive information may not connect to any network outside of the company by any means for any reason.
As far as the definition of "sensitive" goes, I agree with JamesRL. Additionally, people who are authorized to access sensitive information should be told that this or that information is sensitive when they are first given access to the information. If people who access customer information, for example, don't realize that it is sensitive then the company needs to have educational seminars to teach people about these things. The same goes for any other sensitive information.