What happens if BIA does not collect enough money to satisfy the penalty?
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
BIA will send written notice to the trespasser demanding immediate settlement and advising the trespasser that unless settlement is received within 5 business days from the date of receipt, BIA will forward the case for appropriate legal action. BIA may send a copy of the notice to the Navajo Nation, permittee, and any known lien holders.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.