Certainly. Based on the provided legal document, the key points are as follows:

1. Show cause notices issued under Section 74 of the Tamil Nadu Goods and Services Tax Act, 2017, must explicitly allege fraud, wilful misstatement, or suppression of facts to invoke the extended limitation period. The absence of such specific allegations renders the orders invalid (!) (!) .

2. The proper officer is required to specify the jurisdictional facts, i.e., the presence of fraud, wilful misstatement, or suppression of facts, in the show cause notice. Merely indicating non-payment or short payment of tax without these elements is insufficient to activate the extended period (!) (!) .

3. The extended limitation period can only be invoked if the show cause notice clearly discloses the allegations of fraud, wilful misstatement, or suppression of facts. Orders lacking these specific allegations are liable to be quashed (!) .

4. The language used in the show cause notice is crucial; the notice must specify the sum payable and the reasons for the alleged misconduct. Using vague or predetermined terms like "determined" instead of "specified" indicates pre-determination and is not acceptable (!) .

5. Orders or proceedings initiated without recording the existence of jurisdictional facts—such as fraud or suppression—are invalid and must be quashed. When jurisdictional facts are absent, the court cannot remand but must directly set aside the orders (!) (!) .

6. The principles of natural justice require that the allegations against the assessee be specific, and the notice must inform the assessee of the exact conduct constituting fraud, misstatement, or suppression. Orders based on vague or non-specific allegations violate these principles (!) (!) .

7. Orders passed without proper issuance of show cause notices, or where the notices do not contain the necessary allegations, are procedurally flawed and must be invalidated (!) .

8. When an order is found to be bad in law due to lack of jurisdictional facts or procedural irregularities, the court must quash it without remanding for re-issuance, especially when fundamental elements such as fraud or suppression are not established (!) (!) .

9. The circular issued by the authority emphasizes that the invocation of the extended period under Section 74 requires concrete evidence of fraud, wilful misstatement, or suppression of facts, and such evidence must be explicitly included in the show cause notice (!) (!) .

10. The court underscores that mere non-payment or short payment of tax, without proof of the specific elements outlined in Section 74, cannot justify invocation of the extended limitation period. The absence of these elements leads to the quashing of the proceedings (!) .

In summary, the legal principle established is that proceedings under Section 74 require clear, specific allegations of fraud, wilful misstatement, or suppression of facts in the show cause notice. Orders lacking these allegations are invalid, and the court must quash such proceedings to uphold principles of natural justice and procedural correctness.