Business Rules - Energy Domain

Domain rules governing the Italian energy sector. Each rule is identified by a unique code BR-NNN, includes motivation, priority, and traceability to the normative or regulatory source.

Priority legend: CRITICAL = violates system integrity or safety; HIGH = mandatory for operations; MEDIUM = best practice or contractual constraint.

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BR-001 - POD uniqueness per metering point

Code: BR-001 Name: POD code uniqueness Description: Each electricity withdrawal point must have only one active POD code at any given time. The POD is assigned by the DSO and cannot be duplicated in Acquirente Unico's Integrated Information System (SII). Motivation: Ensures unique identification of the supply point for switching, measurements and billing. Priority: CRITICAL Source: ARERA - Integrated Text on Electricity Switching (TIMOE), article 4. Traceability: → MeteringPoint.code, → SupplyContract.pod

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BR-002 - Maximum switching lead times

Code: BR-002 Name: Maximum supplier switching times Description: The electricity supplier switching process must be completed within 30 calendar days from the date the request was submitted by the new supplier to the SII. For gas, the deadline is 30 working days. Motivation: Protects the final customer's right to freely choose their supplier without undue impediments. Priority: CRITICAL Source: ARERA - Deliberation ARG/elt 42/09; TIMOE; Deliberation 639/2016 gas. Traceability: → workflow switching-fornitore; → event SwitchCompletato

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BR-003 - MSD bid price constraints

Code: BR-003 Name: MSD injection bid price not unboundedly negative Description: Injection bids in the Ancillary Services Market (MSD) cannot have unlimitedly negative prices; minimum/maximum price limits are set by Terna in the MSD Rules and revised periodically. Motivation: Prevent market manipulation in the balancing market and ensure system price stability. Priority: HIGH Source: Terna - MSD Rules, Appendix A (Price Limits), 2024 update (www.terna.it). Traceability: → Bid.price; → Market.code = "MSD"

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BR-004 - Validated measurements required for billing

Code: BR-004 Name: Mandatory validated measurements for billing Description: A SupplyContract can only be definitively billed on measurements with status VALIDATED. Measurements in ESTIMATED status may be used for provisional billing but must be recalculated at the first available validated reading with a true-up adjustment. Motivation: Ensures billing accuracy and compliance with ARERA measurement regulation. Priority: HIGH Source: ARERA - Integrated Text on Electricity Measurement (TIME), article 12; Deliberation 654/2015. Traceability: → Measurement.status; → workflow billing

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BR-005 - Withdrawn power within contractual capacity +10%

Code: BR-005 Name: Maximum withdrawal power limit Description: A domestic customer cannot withdraw power exceeding the contractedCapacity increased by 10% (the so-called available power). Exceedance triggers the meter's power limiter. The limit is defined by ARERA regulation. Motivation: Protect the distribution grid from overloads and ensure fairness among users. Priority: HIGH Source: ARERA - Deliberation ARG/elt 198/11; Active Connection Integrated Text (TICA). Traceability: → MeteringPoint.voltageLevel; → SupplyContract.contractedCapacity

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BR-006 - GSE incentives conditional on plant registration

Code: BR-006 Name: Mandatory GSE registration for RES incentive access Description: An Impianto producing from Renewable Energy Sources (RES) can access incentives (Feed-in Tariffs, Net Metering, Dedicated Withdrawal, Guarantees of Origin) only if properly registered in the GSE registry with complete and validated technical data. Motivation: Prevent incentive fraud and ensure only compliant plants access support mechanisms. Priority: CRITICAL Source: GSE - Legislative Decree 199/2021 (RED II transposition); ARERA Deliberation 570/2012 (Net Metering). Traceability: → Impianto.plantCode; → Impianto.operationalStatus

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BR-007 - PUN as reference price for variable contracts

Code: BR-007 Name: PUN as spot market reference index Description: Contracts with offerType = VARIABLE indexed to the spot market must reference the National Single Price (PUN) published daily by GME as the quantity-weighted average of zonal prices in the Day-Ahead Market (MGP). The PUN is expressed in €/MWh. Motivation: Ensure a transparent and verifiable market index for customers on variable indexed offers. Priority: HIGH Source: GME - Electricity Market Rules (www.mercatoelettrico.org); ARERA Deliberation 400/2022. Traceability: → SupplyContract.offerType; → Tariff.energyComponent; → Market.code = "MGP"

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BR-008 - Grid frequency maintained at 50 Hz ±0.2 Hz

Code: BR-008 Name: Power system frequency stability Description: The TSO (Terna in Italy) is obliged to maintain the national grid frequency at 50 Hz with deviations within ±0.2 Hz under normal conditions, activating balancing reserves through MSD and the Balancing Market (MB) to compensate imbalances between generation and consumption. Motivation: Frequency stability is the primary safety condition of the European interconnected power system (ENTSO-E). Priority: CRITICAL Source: ENTSO-E - Network Code on Load-Frequency Control and Reserves (NC LFCR), EU Reg. 2017/1485; Terna - Defence Plan. Traceability: → workflow dispacciamento; → Market.code = "MSD"

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BR-009 - Measurement data sent to SII within 24 hours

Code: BR-009 Name: Smart meter measurements transmitted to SII within 24 hours Description: DSOs managing Smart Meter 2G devices must transmit hourly measurement data to Acquirente Unico's SII within 24 hours of recording. Measurements aggregable into a daily profile must be available by the morning of the following day. Motivation: Enable real-time billing and switching operations based on up-to-date data. Priority: HIGH Source: ARERA - Deliberation 646/2015 (Smart Meter 2G); Deliberation 654/2015 TIME. Traceability: → Measurement.acquisitionTimestamp; → NetworkOperator

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BR-010 - Regulated tariff: access restricted to vulnerable customers post-2024

Code: BR-010 Name: Regulated service reserved for vulnerable customers post-2024 Description: From 1 July 2024, the Servizio di Maggior Tutela (regulated rate) is accessible only to "vulnerable" domestic customers (elderly, disabled, low income, social housing) as defined by Law 124/2017 and subsequent amendments. Non-vulnerable customers must switch to the free market or the Graduated Protection Service (STG). Motivation: Complete the liberalisation of the retail electricity market as required by EU directives (Electricity Directive 2019/944). Priority: HIGH Source: ARERA - Deliberation 243/2024; Law 124/2017; EU Directive 2019/944. Traceability: → SupplyContract.offerType = REGULATED; → FinalCustomer