I don't know if they can, but I'm sure a lot of husbands wouldn't mind showing that bit of text to their wives. "But honey, the government says I have to buy this new <insert desired firearm here>"
More seriously though, from that excerpt it seems like they could only mandate it under specific conditions, such as a general call to arms cause we've been invaded and the regular military/reserves/national guard aren't enough, and there being a need for militias.