The Accord was redesigned for 2018… and we are disappointed that 2C’s head restraint is now fixed and protrudes forward significantly, in a way that will make the installation of most forward-facing car seats & high back boosters impossible in 2C. The good news is that there is no seat belt overlap – so 3-across will still be possible (so long as you pick narrow car seats) but you’ll have to use rear-facing seats in 2C to get around the protruding head restraint problem in 2C. The head restraints for 2D and 2P are removable.
To access the lower anchors you must pull down a large, horizontal fabric flap that is velcroed at the seat crease. 
The Accord was redesigned for 2013 – and the most significant change is that the lower anchors are now appropriately lined up with 2D and 2P such that you can install a car seat in 2D or 2P and it won’t interfere with using 2C, as it did in the prior model years. The head restraints remain adjustable & removable for all 3 seats.
The Accord was refreshed for 2008 and now features a head restraint for 2C (that is adjustable & removable). Finally!
As with the previous models, the lower anchors remain spaced such that the innermost ones for 2D and 2P overlap significantly into 2C – making it such that a car seat installed with the lower anchors in 2D or 2P will prevent the use of 2C (the car seat on the side will block the use of the seat belt in 2C).
The seat belt buckles are on a fairly long piece of seat belt webbing – you may find the need to twist the buckle stalk (up to 3 full revolutions) to shorten it in order to get some car seats installed tightly – as shown here.
Starting in 2010 and going through 2015, the Accord was offered as a hatchback – called the Crosstour. Click here to learn about the Crosstour. 
The Accord was redesigned for 2003. It now has proper head restraints for 2D & 2P that are adjustable and removable… but still no head restraint for 2C.
As with the 2001-2002 Accord, the lower anchors remain spaced such that the innermost ones for 2D and 2P overlap significantly into 2C – making it such that a car seat installed with the lower anchors in 2D or 2P will prevent the use of 2C (the car seat on the side will block the use of the seat belt in 2C).
The seat belt buckles are on a fairly long piece of seat belt webbing – you may find the need to twist the buckle stalk (up to 3 full revolutions) to shorten it in order to get some car seats installed tightly – as shown here.
2001 saw the introduction of lower anchors. There continue to be no proper head restraints in this vehicle .
The lower anchors are spaced such that the innermost ones for 2D and 2P overlap significantly into 2C – making it such that a car seat installed with the lower anchors in 2D or 2P will prevent the use of 2C (the car seat on the side will block the use of the seat belt in 2C). 
2000 saw the introduction of tether anchors – otherwise the back seat is identical to the 1998-1999 model years.
1998 was the first year that a shoulder belt was found in 2C (all previous model years have just a lap belt in 2C).
There are no head restraints in this vehicle. This vehicle does not have LATCH. Tether anchors may be retrofitted – but lower anchors may NOT be retrofitted.
The Accord has had shoulder belts in 2D and 2P going back at least as far as 1984.