diff --git a/.zenodo.json b/.zenodo.json
index a68d4c45..f4bc16ad 100644
--- a/.zenodo.json
+++ b/.zenodo.json
@@ -4,35 +4,25 @@
     "title": "useeior", 
     "upload_type": "software", 
     "creators": [
-        {
-            "affiliation": "General Dynamics Information Technology, Inc.", 
-            "name": "Mo Li"
-            "orcid": "https://orcid.org/0000-0002-3672-1622"
-        }, 
-        {
-            "affiliation": "US Environmental Protection Agency", 
-            "name": "Wesley Ingwersen"
-            "orcid": "https://orcid.org/0000-0002-9614-701X"
-        }, 
         {
             "affiliation": "Eastern Research Group", 
-            "name": "Ben Young"
+            "name": "Ben Young",
             "orcid": "https://orcid.org/0000-0001-6276-8670"
         }, 
         {
             "affiliation": "Eastern Research Group", 
-            "name": "Jorge Vendries"
+            "name": "Jorge Vendries",
             "orcid": "https://orcid.org/0000-0002-8452-229X"
-        }, 
-        {
-            "affiliation": "US Environmental Protection Agency", 
-            "name": "Catherine Birney",
-            "orcid": "https://orcid.org/0000-0003-4467-9927"
+        },
+	{
+            "affiliation": "General Dynamics Information Technology, Inc.", 
+            "name": "Mo Li",
+            "orcid": "https://orcid.org/0000-0002-3672-1622"
         },
         {
-            "affiliation": "Eastern Research Group", 
-            "name": "Andrew Beck",
-            "orcid": "https://orcid.org/0000-0003-4051-6901"
+            "affiliation": "US Environmental Protection Agency", 
+            "name": "Wesley Ingwersen",
+            "orcid": "https://orcid.org/0000-0002-9614-701X"
         }
     ], 
     "access_right": "open"
diff --git a/DESCRIPTION b/DESCRIPTION
index 1f02366e..183fb7cb 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -2,12 +2,12 @@ Package: useeior
 Type: Package
 Title: USEEIO R modeling software
 Version: 1.4.0
-Date: 2023-8-24
+Date: 2024-1-19
 Authors@R: c(
-  person("Mo","Li", email="mo.li@gdit.com", role="aut"),
-  person("Wesley","Ingwersen", email="ingwersen.wesley@epa.gov", role= c("aut", "cre")),
   person("Ben","Young", email="ben.young@erg.com", role="aut"),
-  person("Jorge","Vendries", email="jvendries@gmail.com", role="aut"))
+  person("Jorge","Vendries", email="jvendries@gmail.com", role="aut"),
+  person("Mo","Li", email="mo.li@gdit.com", role="aut"),
+  person("Wesley","Ingwersen", email="ingwersen.wesley@epa.gov", role= c("aut", "cre")))
 Description: The United States Environmentally-Extended Input-Output model
   is a model used to estimate potential environmental and economic impacts
   associated with the production and consumption of goods and services in the US.
diff --git a/README.md b/README.md
index c7f0d35a..4b36353e 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 
 `useeior` is an R package for building and using [USEEIO models](https://www.epa.gov/land-research/us-environmentally-extended-input-output-useeio-models).
 
-The [model object](format_specs/Model.md) is the primary output that is built according to a given [model specification](format_specs/ModelSpecification.md) and optional hybridization specification, e.g. [disaggregation](format_specs/DisaggregationAndAggregationSpecification.md).
+The [model object](format_specs/Model.md) is the primary output that is built according to a given [model specification](format_specs/ModelSpecification.md) and optional hybridization specification, e.g. [disaggregation](format_specs/ModelCustomization.md).
 [Model specifications](inst/extdata/modelspecs) and associated hybridization specifications, e.g. [disaggregation](inst/extdata/disaggspecs), for EPA-validated models are included in the package.
 
 `useeior` offers various functions for validating, calculating, visualizing, and writing out models and/or their components.
diff --git a/format_specs/ModelSpecification.md b/format_specs/ModelSpecification.md
index 51cbfe60..a9326897 100644
--- a/format_specs/ModelSpecification.md
+++ b/format_specs/ModelSpecification.md
@@ -7,11 +7,11 @@ Model specifications are assigned in a yml file based on the parameters shown be
 | BaseIOSchema | int | Y | The base IO schema (e.g. 2012) |
 | BaseIOLevel | str | Y | The base IO level of detail (e.g. `Detail`) |
 | IOYear | int | Y | The base IO year |
-| PrimaryRegionAcronym | str | Y | The primary region acronym |
 | ModelRegionAcronyms | list | Y | The model region acronyms |
 | ModelType | str | Y | The [model type](#Model-Types) (e.g. `EEIO`) |
-| ModelSource | str | Y | The model source |
-| BasePriceType | str | Y | The model base price type (producer or purchaser) |
+| IODataSource | str | Y | The model source (e.g. `BEA` or `stateior`) |
+| IODataVersion | str | N | Required if IODataSource is `stateior`, [stateior model version number](https://github.com/USEPA/stateior/wiki/Planned-Package-Releases) |
+| BasePriceType | str | Y | The model base price type (`PRO`: producer or `PUR`: purchaser) |
 | BasewithRedefinitions | bool | Y | Whether the model is based with redefinitions (TRUE or FALSE) |
 | CommodityorIndustryType | str | Y | Define if this is a commodity x commodity (`Commodity`) or industry x industry (`Industry`) model |
 | ScrapIncluded | bool | Y | Whether the model includes scrap (TRUE or FALSE) |