I am sorry, but the case information you provided is insufficient to create a case summary. The provided information lacks crucial details necessary for a legal analysis. Specifically, the following are missing:

• Complete Case Title: "Section 18 in Indian Divorce Act, 1869" is not a case title. I need the actual name of the case (e.g., ABC v. XYZ). Section 18 of the Indian Divorce Act, 1869, deals with decrees for dissolution of marriage.
• Court: "Union of India - Section" is not a valid court designation. I need the specific court that heard the case (e.g., Supreme Court of India, High Court of Delhi).
• Date: While you provided a date, it seems to be the date of the Act itself, not the date of a specific judgment.
• Case Content: The most critical element is missing: a summary of the actual facts, arguments, and judgment of a specific case. I need information about a real legal dispute.

Without these essential details, I cannot provide an accurate or meaningful case summary. Please provide a complete case citation and a summary of the case's facts, issues, arguments, and judgment.