The ``++<label>++`` tag improves usability for visually impaired users: Screen readers will announce the label text whenever the focus is set on the input field.
It also improves usability for users with impaired motor control: when the text within the ``++<label>++`` element is clicked, the associated input field is toggled.
In most cases, ``++for++`` attribute of the ``++<label>++`` tag should be equal to the ``++id++`` attribute of the related element to bind them together.
Sometimes the field is explained by an icon. In this case the label can be either hidden or the ``++<input>++``, ``++<select>++`` or ``++<textarea>++`` tags should contain one of the following attributes: ``++aria-label++``, ``++aria-labelledby++``. Screen-readers will use those attributes to describe the field.
The purpose of this rule is to make sure that every ``++input++`` (except ``++submit++``, ``++button++``, ``++image++``, and ``++hidden++`` inputs), ``++select++``, and ``++textarea++`` field has a label.
No issue will be raised on "implicit labels", i.e. ``++<label>++`` tags enclosing an ``++<input>++``, ``++<select>++`` or ``++<textarea>++`` instead of being referencing via an``++id++``. However, note that the support of this technic is not supported by all assistive technologies. Thus it is better to reference them by id.
