Prohibited Degrees of Relationship

Introduction

The concept of prohibited degrees of relationship refers to those family relationships within which marriage is legally forbidden. Such prohibitions exist in almost all legal systems to preserve family morality, prevent exploitation within close family structures, avoid genetic risks associated with consanguineous marriages, and maintain social order.

In India, the doctrine is primarily governed by:

• The Hindu Marriage Act, 1955
• The Special Marriage Act, 1954
• The Indian Christian Marriage Act, 1872
• The Parsi Marriage and Divorce Act, 1936
• Muslim personal law principles relating to prohibited relationships

Under the Hindu Marriage Act, marriage between persons within prohibited degrees is generally void unless a valid custom permits such marriage.

Meaning Under Hindu Marriage Act, 1955

Section 3(g) of the Hindu Marriage Act defines degrees of prohibited relationship. Two persons are within prohibited degrees if:

1. One is a lineal ascendant of the other.
2. One was the spouse of a lineal ascendant or descendant of the other.
3. One was the spouse of the other's uncle, aunt, granduncle, or grandaunt.
4. The parties are:
   • Brother and sister,
   • Uncle and niece,
   • Aunt and nephew,
   • Children of brother and sister,
   • Children of two brothers,
   • Children of two sisters. 

The prohibition extends to:

• Full blood relationships
• Half-blood relationships
• Uterine blood relationships
• Illegitimate relationships
• Adoptive relationships 

Categories of Prohibited Relationships

1. Lineal Ascendants and Descendants

Marriage is prohibited between persons directly descended from one another.

Examples

• Father and daughter
• Mother and son
• Grandfather and granddaughter
• Grandmother and grandson

Such marriages are universally void because one party is a direct ancestor of the other.

2. Collateral Relationships

Collateral relatives are those connected through a common ancestor.

Examples

• Brother and sister
• Half-brother and half-sister
• Uncle and niece
• Aunt and nephew

The law prohibits these marriages because of close blood ties.

3. First Cousin Relationships

Under Hindu law, children of:

• Two brothers,
• Two sisters,
• Brother and sister,

are generally within prohibited degrees unless custom permits otherwise.

Certain South Indian communities recognize customary cross-cousin marriages, which operate as exceptions.

4. Relationships by Affinity

Affinity means relationship created through marriage rather than blood.

Examples

• Marriage with stepmother
• Marriage with son's widow
• Marriage with uncle's widow

Such relationships are prohibited despite the absence of blood connection.

5. Adoptive Relationships

Adoption creates legal relationships equivalent to blood relationships.

Examples

• Adoptive father and adopted daughter
• Adoptive brother and adopted sister

Marriage between such persons is prohibited.

Effect of Marriage Within Prohibited Degrees

A marriage performed in violation of prohibited relationship rules is generally:

• Void ab initio (void from the beginning)
• Capable of being annulled by a court
• Punishable under statutory provisions in certain cases

The parties acquire no legal marital status unless protected by a recognized custom.

Exception: Custom and Usage

Section 5(iv) of the Hindu Marriage Act provides that marriage within prohibited degrees may be valid where a custom governing both parties permits such marriage.

To qualify as a valid custom, it must be:

• Ancient
• Certain
• Continuous
• Reasonable
• Not opposed to public policy

The burden of proving the custom lies upon the person asserting it.

Important Case Laws

1. Sharad Dutt v. Kiran

Facts

The parties were related within prohibited degrees and sought recognition of their marriage based on custom.

Held

The court held that a marriage falling within prohibited degrees is void unless a valid and established custom permitting such marriage is proved.

Principle

Custom must be specifically pleaded and proved.

2. Lakshmi Sanyal v. Sachit Kumar Dhar

Facts

The issue concerned prohibited degrees under Christian marriage law.

Held

The Supreme Court examined whether the parties fell within prohibited degrees according to their personal law and customary practices.

Principle

Determination of prohibited relationship depends upon the governing personal law and recognized customs.

3. V.H. Lopez v. E.J. Lopez

Facts

The court examined prohibited degrees under Christian matrimonial law.

Held

The court ruled that prohibited degrees are determined according to the applicable personal law rather than solely English law principles.

Principle

Personal law governs questions of prohibited relationship.

4. Indra Sarma v. V.K.V. Sarma

Facts

The Supreme Court discussed conditions necessary for a valid marriage while examining relationships resembling marriage.

Held

The Court reiterated that a valid Hindu marriage requires compliance with Section 5, including the prohibition against marriages within prohibited degrees.

Principle

Marriage violating statutory conditions lacks legal validity.

5. Amini Dutta v. State

Facts

The case involved consideration of statutory requirements for a valid marriage.

Held

The court emphasized that parties must not fall within prohibited degrees unless custom authorizes the union.

Principle

Compliance with Section 5(iv) is mandatory.

6. Rajesh Kumar v. State

Facts

The validity of marriage was challenged on grounds of prohibited relationship.

Held

The court reiterated that marriages within prohibited degrees are invalid unless protected by recognized custom.

Principle

Statutory prohibitions prevail over personal preference.

7. Chhattisgarh High Court Cousin Marriage Case

Facts

A marriage between children of two real sisters was challenged as being within prohibited degrees.

Held

The High Court declared the marriage null and void because the alleged "Brahma Marriage" custom was not proved to have acquired legal force.

Principle

Mere assertion of custom is insufficient; continuous and uniform observance must be established.

Position Under Other Personal Laws

Muslim Law

Muslim law prohibits marriage based on:

1. Consanguinity (blood relationship)
2. Affinity (relationship by marriage)
3. Fosterage (relationship through breastfeeding)

Marriage within these prohibited categories is generally void.

Christian Law

Marriage between persons within prohibited degrees of consanguinity or affinity is not valid under Christian matrimonial law.

Parsi Law

The Parsi Marriage and Divorce Act contains a detailed schedule of prohibited relationships based on consanguinity and affinity. Marriage within these degrees is invalid.

Conclusion

The doctrine of prohibited degrees of relationship is a fundamental aspect of family law. It prohibits marriages between closely related persons by blood, adoption, or affinity. Under Indian law, particularly the Hindu Marriage Act, marriages within prohibited degrees are generally void unless a valid custom authorizes them. Courts consistently require strict proof of such customs and have repeatedly invalidated marriages where the parties failed to establish a legally recognized exception. The doctrine safeguards family structure, prevents abuse of familial relationships, and promotes social and genetic well-being.