Ford is one of the first carmakers to announce the effect of recently tightened rules for federal electric-vehicle tax credits, saying just two of its EV models qualify for the full $7,500 break.

The Dearborn, Mich.-based brand’s six EV and plug-in hybrid models qualify for at least some of available federal credits, but just the F-150 Lightning truck and the Lincoln Aviator Grand Touring sports-utility vehicle get consumers the full amount. The Mustang Mach-E, E-Transit van, Escape Plug-In Hybrid and Lincoln Corsair Grand Touring SUV qualify for just $3,750 in credits.

Other carmakers have said the newly tightened eligibility rules would cut credits for their models but haven’t announced particulars.

The stricter qualifications take effect April 18 after the Treasury Department introduced new guidance on EV battery material sourcing limits. Until then, previously issued guidance determines eligibility, so some models that currently qualify will be eliminated or get smaller credits, depending on materials used in their batteries.

LEARN MORE: EV Tax Credit Rules to Tighten