I'm led to believe that the answer is "Not quite", you can do "training as required to achieve the standard" although it will likely have a minimum number of hours - which I don't have instantly to hand. But you'll have to have a licence to add the ratings to (which also means that you have to first take the CPL and the Instrument Rating on each class of aircraft that you wish to instruct on).
The FAA rating, by the way, has three different rides for the total package - single engine instructor, multi engine instructor and instrument instructor. All require flights and oral exam with an examiner and all require a (computer based) written examination.
So if aiming to teach instruments on both single and multi engine you will need Single Engine CPL. Multi Engine CPL, Single Engine I/R, Multi Engine I/R, Single Engine Instructor, Multi Engine Instructor, Instrument Instructor.
7 flight tests to go from zero.
No doubt somebody more qualified in the FAA way will be able to give you a "neater" answer.