\LoadClass & \LoadClassWithOptions ¶Synopses:
\LoadClass[options-list]{class-name}[release-date]
\LoadClassWithOptions{class-name}[release-date]
Load a class, as with
\documentclass[options-list]{class-name}[release-date].
An example: \LoadClass[twoside]{article}.
The options-list, if present, is a comma-separated list. The
release-date is also optional. If present it must have the form
YYYY/MM/DD.
If you request release-date and the date of the package installed on your system is earlier, then you get a warning on the screen and in the log like this:
You have requested, on input line 4, version `2038/01/19' of document class article, but only version `2014/09/29 v1.4h Standard LaTeX document class' is available.
The command version \LoadClassWithOptions uses the list of
options for the current class. This means it ignores any options passed
to it via \PassOptionsToClass. This is a convenience command
that lets you build classes on existing ones, such as the standard
article class, without having to track which options were passed.