Every LienBond calculator evaluates abstract syntax tree mathematical formulas anchored to primary statutory authorities: 40 U.S.C. Section 3131 (Federal Miller Act), U.S. Treasury Circular 570, State Contractors License Board bond schedules, NCCI Experience Rating Plan Manuals, 50-state mechanics lien codes, and 40 U.S.C. Section 3141 Davis-Bacon WH-347 rules.