Subject to this section, the appropriate national authority, if on an application for a direction under this section it considers that the operation of a requirement in building regulations would be unreasonable in relation to the particular case to which the application relates, may after consultation with the local authority, give a direction dispensing with or relaxing that requirement.
If building regulations so provide as regards a requirement contained in the regulations, the power to dispense with or relax that requirement under subsection (1) above is exercisable by the local authority (instead of by the appropriate national authority after consultation with the local authority).
Building regulations made by virtue of subsection (2) above may except applications of any description.
If, in a case where the regulator is the building control authority—
it may give a direction dispensing with or relaxing the requirement.
No application under subsection (1) or (2) may be made in a case where the regulator is the building control authority.
If—
the public body may give a direction dispensing with or relaxing that requirement.
In subsection (4) above, "public body" means—
Building regulations may provide as regards a requirement contained in the regulations that subsections (1) to (5) above do not apply.