Please see the enclosed file "FSLA_NonCommercial_License.html", or visit the link for the terms of use of this font. Long story short, you can use this font for free for Non-Commercial (Personal) use, but if you want to use it for Commercial use you will need to purchase a license here: http://chequered.ink/font-license/
Thank-you, and enjoy the font!
Hannover Messe Sans font download, Hannover Messe Sans font.