Mississippi HVAC replacement: residential HVAC subcontractors of any tier are in § 73-59-3(1)(d)(iv)'s annual-license list — 'no matter the dollar amount' (statutory reading; the board's page exempts under-$10,000 work and omits mechanical from its list entirely — CONFLICT-MS-001's home turf). Commercial HVAC over $50,000 sits under the COR's Mechanical Work major. There is NO mechanical bond and NO bond of any kind — insurance is the only financial security the state names.
Residential sub-trades — electrical, plumbing, mechanical, HVAC — licensed at ANY dollar amount (statutory reading; conflicting) — § 73-59-3(1)(d) verbatim: '[a]ny subcontractor, of any tier, performing the following work or within the following trade, on any residential construction or residential improvement project, no matter the dollar amount of the construction or improvements: (i) Electrical; (ii) Plumbing; (iii) Mechanical; and/or (iv) Heating, ventilation and/or air conditioning.' MSBOC's own How-Do-I page countermands the low end: 'If you are performing residential electrical, plumbing, or HVAC work less than $10,000, a state license is not required' (mechanical omitted even there). Both sources are official and live — CONFLICT-MS-001 preserved unresolved; this row seeds the STATUTORY reading with confidence=conflicting and sub-threshold scope answers stay NOT_DETERMINED where it matters. S-MS-CODE-73-59-3
Certificate of Responsibility required to bid or contract on commercial work over $50,000 — Miss. Code § 31-3-21(1) verbatim: 'It shall be unlawful for any person who does not hold a certificate of responsibility issued under this chapter to submit a bid, enter into a contract, or otherwise engage in or continue in this state in the business of a contractor.' MSBOC FAQ #1: 'All contractors and subcontractors performing work on commercial jobs over $50,000, including equipment installation, are required to have a commercial license issued by MSBOC.' A COR is 'the official name for a commercial license' (How-Do-I). Fire sprinkler carve-out: commercial license required on public projects over $5,000 and private projects over $10,000. S-MS-CODE-31-3-21
No surety bond is required for any Mississippi contractor credential (verified absence) — Mississippi requires NO surety bond for the commercial Certificate of Responsibility or the residential license. The statutory scheme corroborates the insurance model and forbids the board from even setting bonding capacity: Miss. Code § 31-3-13(h) verbatim — 'the powers of the State Board of Contractors shall not extend to fixing a maximum limit in the bid amount of any contractor, or the bonding capacity … and the Board of Contractors shall not have jurisdiction or the power or authority to determine the maximum bond a contractor may be capable of obtaining.' No bond appears on MSBOC's application checklist, FAQ, How-Do-I or classification pages (read 2026-10-06). What exists instead: general liability insurance — commercial $300,000/occurrence + $600,000 aggregate, residential proof of coverage with no dollar minimum stated. S-MS-CODE-31-3-13
General liability insurance — commercial $300,000/$600,000; residential proof of coverage, no dollar minimum — FAQ #4 verbatim: 'All applicants for a license or renewal must provide proof of general liability insurance coverage. MSBOC must be listed on the policy to receive notification in the event of cancellation. … Commercial applicants must provide a certificate of insurance showing minimum coverage of $300,000 per occurrence and $600,000 aggregate.' Application video: 'There is no minimum coverage amount required for residential applicants, just proof of coverage.' § 73-59-3(3) is the statutory hook for residential ('The board may require liability insurance … and it shall be reflected on the certificate of licensure'). Every ACTIVE license holder must maintain proof to stay in good standing; inactive licensees are exempt from the insurance requirement. S-MS-BOC-FAQ
Workers' compensation proof at 5 or more employees — Application video verbatim: 'If you have 5 or more employees, please submit proof of workers compensation coverage.' § 73-59-3(2)(a) is the statutory hook: proof 'if required by applicable law; however, workers' compensation insurance shall not be required for inactive licensees.' Failure to maintain required workers' comp is a disciplinary ground (§ 73-59-13(1)(f)). S-MS-BOC-LICENSE