In most cases it is possible to produce one generic CV that covers everything, and may just need minor tinkering or a differently focused cover letter, depending on your target. Don’t think of this as a formula that you have to stick to; the objective is rather to produce lively writing that anticipates the needs of the reader and generates interest in you without telling them absolutely everything.

I would avoid templates restrict your self expression; the results will not compare with what can be achieved simply through good writing. Every career is so different that there simply are no rules about what you should include and how you should set your CV out. There are suggestions, freely available, but I would ignore them and use your own instincts to create something that actually works.

Internationally there are supposed to be rules but all that has also changed since the books were written. I have created CVs for virtually every location on earth including Fiji and Iceland and the only guideline I follow is to make the text as universally comprehensible as possible, bearing in mind that some nationalities and professions favour academic background, others lean to results or experience and in some circumstances it will be concepts, methods and insight that makes your case.