(1) Except for stairs or ramps serving a house or an individual dwelling unit, at least one required handrail shall be continuous throughout the length of the stair or ramp, including at the landings, except where interrupted by doorways.
(2) For stairs or ramps serving a house or an individual dwelling unit, at least one required handrail shall be continuous throughout the length of the stair or ramp, except where interrupted by,
(a) doorways,
(b) landings, or
(c) newel posts at changes in direction.