Words similar to therefor

Example sentences for: therefor

How can you use “therefor” in a sentence? Here are some example sentences to help you improve your vocabulary:

Section 808(2) states that, notwithstanding section 801, "any rule which an agency for good cause finds (and incorporates the finding and a brief statement of reasons therefor in the rule issued) that notice and public procedure thereon are impracticable, unnecessary, or contrary to the public interest" shall take effect at such time as the federal agency promulgating the rule determines.
Would Mellinkoff banish such useful words as heretofore, theretofore, hereto, and therefor ? Would we abandon the subjunctive mood, adverbs, Latin idioms, bon mots, and the like?
The FISA definition of "foreign power" includes "a group engaged in international terrorism or activities in preparation therefor."