Exemption for professional institutions under section 10(23A) requires Central Government approval and exclusive application of income to objects.
Exemption under section 10(23A) requires that an institution apply its income, or accumulate it for application, solely to the objects for which it is established, and that the institution be approved by the Central Government; both conditions are cumulative for claiming the exemption.

Exemption for research association income requires exclusive application to objects and permitted investments with corpus exceptions.
Exemption requires that the research association apply its income, or accumulate it, wholly and exclusively to its objects, and that funds not be invested or deposited during the previous year except in forms permitted for trusts; exceptions to the investment restriction include assets forming part of the corpus, accretions to shares forming the corpus, and voluntary contributions maintained in kind such as jewellery or furniture.

Letting of former ruler's palace results in taxable income under section 10(19A), not eligible for exemption.
If any palace or portion occupied by a former ruler is let out, the rent or annual value of that let-out portion is not exempt and is taxable rather than eligible for the exemption applicable to former rulers.

Family pension exemption shields dependents of government servants or decorated servicemen from taxable income under income tax law.
Any amount received as family pension by members of the family of an individual who has been in Government service or has been awarded the Vir Chakra is fully exempted under the relevant income tax provision, and therefore excluded from the recipient's taxable income as an assessee-specific exemption.

Share of profit exemption: interest on capital and partner remuneration are not covered under the provision.
The exemption is confined to a partner's share of profit from the firm or LLP and does not extend to interest on capital or to remuneration paid to the partner; such receipts must therefore be treated separately from the profit-share exemption.

Exemption for HUF distributions may not apply where clubbing rules apply, affecting taxability of co parcener receipts.
Amounts received by an individual co parcener from the HUF are exempt in the hands of the assessee under the general exemption for such receipts, subject to the overriding provision dealing with clubbing or attribution of income which can limit that exemption.