Examine how secondary sanctions targeting entire transaction chains challenge India's strategic autonomy in trade and energy diplomacy.

Secondary sanctions are restrictions imposed not on the target state but on third-country firms dealing with it, enforced by denying them access to the sanctioning country's financial system. As US measures now cover the whole transaction chain — banking, insurance, shipping — India's sovereign choices in energy trade are increasingly shaped by networks it does not control.

How the chain is squeezed

• Finance: settlement of oil trade runs through dollar-clearing correspondent banks; a listing makes foreign banks withdraw pre-emptively to protect their own access.
• Insurance and shipping: cover for vessels is sourced largely from foreign reinsurance markets, a second chokepoint beyond Indian jurisdiction.
• Maritime passage: counter-measures at the Strait of Hormuz, through which much of India's West Asian crude transits, expose Indian-linked carriers to detention risk.
• Reach beyond jurisdiction: Indian companies and nationals have themselves been listed over Iranian petroleum trade, with the government's role limited to examining and engaging with the US side [4].

Erosion of strategic autonomy

• Connectivity projects hostage to waivers: the US exemption for Chabahar Port — India's gateway to Afghanistan and Central Asia [1] — was revoked with effect from 29 September 2025, and the relief that followed carried a fixed expiry, leaving Indian firms uncovered in the interim [2].
• Trade diversification constrained: India is among Iran's largest trade partners [1], yet commercial decisions now track sanctions calendars set abroad.
• Fragmented response: no single ministry tracks a listing from notice to end-use impact; banks act in hours, governments in weeks.

Cushions and the way ahead

• The Special Rupee Vostro Account mechanism enables rupee invoicing of trade [3], though correspondent banking and insurance remain external.
• A standing nodal sanctions desk under the Cabinet Secretariat, a written RBI rule book for listed clients, domestic marine reinsurance capacity, and pre-negotiated waiver renewals.

Strategic autonomy today depends less on declaring independence than on building redundancy in payments, insurance and shipping. Deepening rupee settlement and indigenous maritime cover, alongside sustained diplomacy, can convert India's exposure into resilience.