The limited timeframe in which a subcontractor can identify and formally report hidden site conditions that differ from the original contract scope. Missing this window typically voids your right to claim additional compensation or schedule relief. Review your contract carefully — discovery windows can be as short as 24 to 72 hours after encountering the condition.
Discovery Window
Related Terms
Excavation Guarding
CompliancePhysical barriers, signage, and safety controls required around open excavations to prevent falls and unauthorised access. Subcontractors are responsible for installing and maintaining guarding on their worksites. Failure to comply can result in stop-work orders, fines, or liability for incidents.
OFAC (Office of Foreign Assets Control)
ComplianceA U.S. Treasury agency that enforces sanctions against designated countries, companies, and individuals. Subcontractors must screen clients and vendors against OFAC lists before accepting contracts or payments. Working with a sanctioned party can result in severe fines and contract termination.
Federal Onshore Acreage
ComplianceLand managed by the federal government and leased for oil, gas, or resource extraction. Work on these lands requires additional permits, compliance steps, and federal oversight. Subcontractors must verify their employer holds valid federal authorisations before mobilising.
FERC (Federal Energy Regulatory Commission)
ComplianceThe U.S. federal body that regulates interstate energy infrastructure, including pipelines and transmission lines. Projects requiring FERC approval often have strict compliance timelines that affect subcontractor scheduling and scope. Work on FERC-regulated assets may require additional permitting and documentation.
MSHA (Mine Safety and Health Administration)
ComplianceA U.S. federal agency that regulates safety at mines and quarries. Subcontractors working on mine sites must comply with MSHA standards, separate from OSHA rules. Workers may require site-specific MSHA training before mobilising.
Venting
ComplianceThe controlled release of gases from pipelines, vessels, or equipment during maintenance, commissioning, or decommissioning work. Subcontractors must follow site-specific venting procedures to remain compliant with environmental and safety regulations. Improper venting can result in work stoppages, fines, or removal from site.
Latest Compliance News
Red Seal $5,000 Completion Bonus Portal Opens Nov. 16
Canadian journeypersons certified in a Red Seal trade on or after April 1, 2025 can apply for a $5,000 federal bonus starting Nov. 16, 2026. Here is what employers should prepare now.
2 days agoComplianceTraffic Exposure Was the Top Hazard on Caltrans LA Tunnel Relighting
On Aldridge Electric's I-405/I-105 tunnel relighting in Los Angeles, traffic breaches drove the safety plan. Here is what electrical and traffic control subs can take from it before bidding live-traffic work.
4 days agoComplianceFinning Fined $155K After 2023 Loader Injury Near Fort McMurray
Finning International pleaded guilty to an Alberta OHS Code count after a worker was struck by a moving loader in 2023. The $155,000 creative sentence funds third-party-site safety training.
5 days agoComplianceMIOSHA Cites MDOT Over Lane Closure in Fatal U.S. 127 Crash
MIOSHA found MDOT failed to close a lane during a rolling pothole repair on U.S. 127 where two road workers died in May. Highway maintenance subs should review their own moving-operation traffic control.
7 days agoRelated Guides
When a Jobsite Incident Happens: What Field Workers Need to Know Before Signing Anything
What to do after a jobsite injury or incident, what your rights are before signing incident reports, how workers' compensation works, and how to protect yourself on multi-employer worksites.
Compliance GuideOSHA Citations on Multi-Employer Worksites: What Subcontractors Need to Know
Learn how OSHA's multi-employer citation policy works, why subcontractors get cited for hazards they didn't create, and how to protect your company on operator-controlled job sites.
Compliance GuideHow to Read and Negotiate an Oilfield Master Service Agreement (MSA): A Subcontractor's Guide
Learn which MSA clauses actually matter for oilfield subcontractors: indemnity, insurance, payment terms, and change orders. Know what you're signing.
Stay sharp on field operations
Industry news and insights, delivered to your inbox.
Subscribe to FieldNews
