You won't be able to import the LIN linetype files into ArchiCAD directly. If you can get someone to import them into an AutoCAD DWG and draw one of each of the lines, you can then import the DWG. The the lines will come across into ArchiCAD format. If the feds have a DWG template file, it would be beneficial to import that as well.
As far as the pen weights, it would be best to map it manually based on a chart. There were several iterations based on previous versions. Also, ArchiCAD 12 has the "NCS Plot Pens" pen set in the default template.
I would also recommend getting the NCS literature. FYI, the NCS consists of 3 parts:
1. The Uniform Drawing System (UDS) published by CSI
2. The CAD Layer Guildelines (CLG) published by AIA
3. The US Coast Guard plotting standards (I've not seen this)
It's silly expensive (you can get the PDF for $410, or it's only $290 if you're an AIA CSI, or NIBS member), but you can get it here:
http://www.buildingsmartalliance.org/ncs/
Chuck Kottka
Orcutt Winslow
Phoenix, Arizona, USA
ArchiCAD 25 (since 4.5)
Macbook Pro 15" Touchbar OSX 10.15 Core i7 2.9GHz/16GB RAM/Radeon Pro560 4GB