Complex sentence: The Letter monopoly (German: Briefmonopol) was enshrined in the German law, and until the end of 2005 it granted an exclusive license to the German post office, Deutsche Post, for the transport of letters and catalog deliveries of up to 100 grams.
Split into simpler sentences: The Letter Monopoly (German: Briefmonopol) was enshrined in the German law. Until the end of 2005, it granted an exclusive license to the German post office, Deutsche Post, for the transport of letters and catalog deliveries of up to 100 grams.