This is a first for me. In MN we use the 2012 IRC. We are doing a small addition 23x15 with a crawlspace so just a 4.5' ICF wall. As my usual we are doing a key way footing and then adding some dowels. The building official says there is no provision for keyways or dowels to replace R404.1 laterally supported wall "1. Full basement floor...poured tight against the bottom of the foundation wall" I don't want to do this first off, it is ridiculous, second access is bad and I want to pour the walls and the floor at the same time and removing insulation is ridiculous. Does anyone know of somewhere in the code that allows a keyway or dowels as a substitute?

A crawlspace can have no more than 4 feet of backfill and be no taller than 5 feet. Never backfill before the floor is installed on top.
Lateral support at top is the floor (TJI's on a sill plate or what have you).
Lateral support at bottom is achieved through dowels. The strip footing provides this resistance. Not the slab.. That's why crawlspaces do not have slabs but gravel..
So... R404.1 tells you that you can use PCA-100 instead. You can use R404.1 but it is obscure and needs a bit of work...
The 2012 edition of PCA-100 says that:

Concrete walls enclosing crawlspaces shall be constructed in accordance with Figure 3.2 and shall be laterally supported at the top and bottom of the wall in accordance with Chapter 6.

in chapter 6 - section 6.2 (still in PCA-100) says:

For buildings assigned to Seismic Design Category A, B, or C
and located where the wind velocity pressure in accordance
with Table 5.1A is less than or equal to 40 psf (1.95 kN/m2),
No. 4 Grade 40 (280 MPa) vertical dowels at a maximum
spacing of 32 inches (813 mm) on center, or No. 5 vertical
dowels at a maximum spacing of 48 inches (1219 mm) on
center shall be installed across the construction joint between
the foundation wall and the footing

PCA100 does not say this but it is a good idea to bend these straight vertical dowels into L's and alternate the feet left to right. The dowels have to reach into the footing by 8" and into the wall by another 8 inches min. So the entire bar would be a minimum of 2 feet (8+8+8) but id go to 36.
The length of the L is typically 8 inches.
There are some more requirements/exceptions but they most likely do not apply to you.

Next time - call the manufacturer

BuildBlock did send me the PCA 100-2012, but I do not see that R404.1 allows PCA 100 instead. Is that new in IRC 2012?

We did a keyway in the footing so we will have to drill in dowels.

We have an engineer who gives a stock design for our mono pour system. With a job this size we pour the footing, walls and usually a rat slab in one step using a line pump. We have one coming up in a couple of weeks if I remember I'll take some pictures.

Here it is from IRC 2012...

R404.1.2 Concrete foundation walls. Concrete foundation
walls that support light-frame walls shall be designed
and constructed in accordance with the provisions of this
section, ACI 318, ACI 332 or PCA 100. Concrete foundation
walls that support above-grade concrete walls that are
within the applicability limits of Section R611.2 shall be
designed and constructed in accordance with the provisions
of this section, ACI 318, ACI 332 or PCA 100. Concrete
foundation walls that support above-grade concrete
walls that are not within the applicability limits of Section
R611.2 shall be designed and constructed in accordance
with the provisions of ACI 318, ACI 332 or PCA 100.
When ACI 318, ACI 332, PCA 100 or the provisions of
this section are used to design concrete foundation walls,
project drawings, typical details and specifications are not
required to bear the seal of the architect or engineer
responsible for design, unless otherwise required by the
state law of the jurisdiction having authority.

Thank you. I will submit this info to the BO.