Section 23 of the Central Goods and Services Tax (CGST) Act, 2017, specifically addresses persons not liable for registration, acting as a crucial exemption within the broader Chapter 7 on Registration (Sections 22-30). One of the primary categories explicitly exempted under this section comprises individuals or businesses exclusively supplying non-taxable or wholly exempt goods/services.
1. Non-Taxable Supply: A "non-taxable supply" is defined as a supply of goods or services or both which is not leviable to tax under the CGST Act or the Integrated Goods and Services Tax (IGST) Act. Examples of such supplies include alcoholic liquor for human consumption and specified petroleum products (petroleum crude, high-speed diesel, motor spirit/petrol, natural gas, and aviation turbine fuel) where the levy of GST has been deferred.
2. Wholly Exempt from Tax / Exempt Supply: An "exempt supply" means a supply of any goods or services or both which attracts a 'NIL' rate of tax or which may be wholly exempt from tax under Section 11 of the CGST Act or Section 6 of the IGST Act, and includes non-taxable supply. This category comprises:
◦ Supplies taxable at a 'NIL' rate of tax, as notified (e.g., under Notification No. 11/2017-CT(R)).
◦ Supplies that are wholly exempted from CGST or IGST by way of a specific notification (e.g., Notification no. 2/2017-CT(R) for goods and 12/2017-CT(R) for services).
◦ Exclusions from "Exempt Supply": For the purpose of ITC reversal under Section 17(2), certain transactions are specified to be included, while others are explicitly excluded or treated differently:
▪ Activities or transactions specified in Schedule III (e.g., high-sea sales, sale of land and completed building, warehoused goods before home consumption) are generally treated as "neither a supply of goods nor a supply of services". While generally excluded from "exempt supply", for limited purposes of Section 17(2) and (3), certain Schedule III transactions like sale of land and completed building (paragraph 5) and supply of warehoused goods (paragraph 8(a)) are treated as "exempt supplies" for ITC reversal calculation.
▪ "Pure agent" transactions are considered "no supply" and not "exempt supply".
▪ Government subsidies linked to price are not exempt supplies.
▪ "Sale of business as a going concern" is an exempt supply (under Notification No. 12/2017-CT(R)) but is specifically noted as not requiring ITC reversal under Section 17(2).
◦ Examples: A municipal body (like BMC) whose turnover consists entirely of exempt supplies (e.g., municipal solid waste management) is not liable to registration under Section 23(1)(a). If the principal supply of electricity transmission and distribution is exempt, related services (like registration or testing charges) are also exempt if naturally bundled.
The "Exclusively" Condition
The exemption under Section 23(1)(a) applies only if the person is "engaged exclusively" in supplying such non-taxable or wholly exempt goods or services. The term "exclusive" implies that the person engages only in such supplies. If a supplier makes even a small value of taxable supplies, this provision is not applicable, and they would be required to obtain registration under Section 22 if their aggregate turnover crosses the specified threshold.
Section 23(1)(a) in the Larger Context of Registration (Sections 22-30)
Section 23 provides a critical exemption, potentially overriding the general liability for registration based on turnover and even certain compulsory registration requirements.
• Override of Section 22 (Persons Liable for Registration): Section 23 provides relaxation from obtaining registration for persons exclusively supplying non-taxable or wholly exempt goods/services, even if their aggregate turnover exceeds the thresholds (e.g., ₹20 lakh for general suppliers or ₹10 lakh for Special Category States) specified in Section 22(1). This means such persons are not obligated to register based purely on their turnover from these exempted activities.
Cases): Section 24 mandates compulsory registration for certain categories of persons irrespective of their aggregate turnover. This section begins with a "Notwithstanding anything contained in sub-section (1) of section 22" clause, implying it overrides the turnover limits. However, the sources highlight a critical nuance regarding Section 23. While Section 23(1)(a) itself does not start with a "Notwithstanding" clause, Section 23(2) (Government's power to notify exemptions) explicitly states: "Notwithstanding anything to the contrary contained in sub-section (1) of section 22 or section 24...". This means that notifications issued under Section 23(2) can override Section 24.
◦ RCM Liability: A common point of conflict arises if a person exclusively making exempt supplies (thus covered by Section 23(1)(a)) also has a liability to pay tax under the Reverse Charge Mechanism (RCM), which would otherwise mandate registration under Section 24(iii). The sources mention a notification (No. 5/2017-Central Tax) that exempts persons who are only engaged in making supplies taxable under RCM from registration. This notification effectively resolves the conflict for such RCM-only suppliers, allowing them to remain unregistered despite Section 24(iii). The Joint Plant Committee case law supports this, stating an applicant engaged exclusively in wholly exempt supplies is not required to be registered if not otherwise liable to pay tax under RCM.
◦ Inter-State Supply of Services: Similarly, while inter-State supply typically triggers compulsory registration under Section 24(i), a notification (No. 10/2017-Integrated Tax, as amended) exempts persons making inter-State supply of taxable services from registration if their aggregate turnover is below ₹20 lakh (or ₹10 lakh for special category States). This is another example of Section 23(2) overriding Section 24.
◦ ECO Suppliers of Goods: From 1st October 2023, persons supplying goods through an Electronic Commerce Operator (ECO) who collects Tax Collected at Source (TCS) under Section 52 are exempted from registration via Notification No. 34/2023-CT, provided their aggregate turnover is below the threshold and they meet specific conditions (e.g., not making inter-State supply of goods or supplying through ECO in more than one State). This exemption also overrides Section 24(ix).
• Relationship with Section 25 (Procedure for Registration): While Section 23 offers exemption, a person not liable for registration under Section 22 or 24 (and thus potentially exempt under Section 23) may still opt for voluntary registration under Section 25(3). However, once voluntarily registered, they become a "registered person" and all provisions of the Act applicable to a registered person apply to them.
◦ A person not liable to be registered under Section 23 does not fall under the definition of a "taxable person" for those exempt activities.
◦ An unregistered person is strictly prohibited from collecting any amount as tax for the supply of goods or services.
◦ If a registered person supplies exempt goods or services, they are required to issue a bill of supply instead of a tax invoice.
◦ Audit provisions (e.g., under Section 65) cannot be conducted for an unregistered person, even if they were potentially required to be registered.
In essence, Section 23(1)(a) provides a fundamental exemption from GST registration for businesses dealing exclusively in non-taxable or wholly exempt goods and/or services, preventing unnecessary compliance burdens. This exemption is further refined and sometimes overridden by notifications issued under Section 23(2), especially concerning specific compulsory registration scenarios like those involving RCM or inter-State service supplies, thereby creating a balanced and adaptive registration framework.

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