[2] Various organizations offer training that meets the requirements of the dive leader standard.
They are also considered competent to conduct emergency procedures associated with these activities and the relevant diving environment.
Additional specialised training and experience is required to lead divers on more demanding dives.
The standards for these certifications may exceed Diver level 3 by a variable and unspecified amount - the equivalency is not reciprocal.
In some countries, such an examination is required by law and it is a prerequisite for any training in many diving schools.