diff --git a/regimes/mx/fuel_complement.go b/regimes/mx/fuel_complement.go
index 3f52bf5a..7cdb9e16 100644
--- a/regimes/mx/fuel_complement.go
+++ b/regimes/mx/fuel_complement.go
@@ -8,58 +8,52 @@ import (
 	"github.com/invopop/gobl/tax"
 )
 
-// FuelComplement carries the data to produce the CFDI's "Complemento de Estado
-// de Cuenta de Combustibles para Monederos Electrónicos" (version 1.2 revision
-// B) which provides detailed information about fuel purchases made with
-// electronic wallets. In Mexico, e-wallet suppliers are required to report this
-// information as part of the invoices they issue to their customers.
+// FuelComplement carries the data to produce a CFDI's "Complemento de Estado de
+// Cuenta de Combustibles para Monederos Electrónicos" (version 1.2 revision B)
+// providing detailed information about fuel purchases made with electronic
+// wallets. In Mexico, e-wallet suppliers are required to report this
+// complementary information in the invoices they issue to their customers.
 type FuelComplement struct {
-	// Customer's e-wallet account number
+	// Customer's e-wallet account number.
 	WalletAccountNumber string `json:"wallet_account_number" jsonschema:"title=Wallet Account Number"`
-	// List of fuel purchases made with the customer's e-wallets
+	// List of fuel purchases made with the customer's e-wallets.
 	Lines []*FuelLine `json:"lines" jsonschema:"title=Lines"`
-	// Summary of all the purchases totals, including taxes (calculated)
+	// Summary of all the purchases totals, including taxes (calculated).
 	Totals *FuelTotals `json:"totals" jsonschema:"title=Totals" jsonschema_extras:"calculated=true"`
 }
 
 // FuelLine represents a single fuel purchase made with an e-wallet issued by
-// the invoice's supplier to the invoice's customer.
+// the invoice's supplier.
 type FuelLine struct {
-	// Identifier of the e-wallet used to make the purchase
+	// Identifier of the e-wallet used to make the purchase.
 	WalletID cbc.Code `json:"wallet_id" jsonschema:"title=Wallet Identifier"`
-	// Date and time of the purchase
-	PurchaseDateTime cal.DateTime `json:"purchase_date" jsonschema:"title=Purchase Date"`
-	// Tax ID (RFC) of the fuel seller
+	// Date and time of the purchase.
+	PurchaseDateTime cal.DateTime `json:"purchase_date_time" jsonschema:"title=Purchase Date and Time"`
+	// Tax ID (RFC) of the fuel seller.
 	SellerTaxID cbc.Code `json:"seller_tax_id" jsonschema:"title=Seller's Tax ID"`
-	// Code of the service station where the purchase was made
+	// Code of the service station where the purchase was made.
 	ServiceStationCode cbc.Code `json:"service_station_code" jsonschema:"title=Service Station Code"`
 	// Amount of fuel units purchased
 	Quantity num.Amount `json:"quantity" jsonschema:"title=Quantity"`
-	// Details about the fuel purchased
-	Item FuelItem `json:"item" jsonschema:"title=Item"`
-	// Identifier of the purchase (folio)
-	PurchaseID cbc.Code `json:"purchase_id" jsonschema:"title=Purchase Identifier"`
-	// Result of quantity multiplied by the item's price (calculated)
-	Total num.Amount `json:"total" jsonschema:"title=Total" jsonschema_extras:"calculated=true"`
-	// Map of taxes applied to the purchase
-	Taxes tax.Set `json:"taxes" jsonschema:"title=Taxes"`
-}
-
-// FuelItem provides the details of the fuel purchased.
-type FuelItem struct {
-	// Reference unit of measure used in the price and the quantity
+	// Reference unit of measure used in the price and the quantity.
 	Unit org.Unit `json:"unit" jsonschema:"title=Unit"`
-	// Type of fuel (c_ClaveTipoCombustible codes)
-	Type cbc.Code `json:"type,omitempty" jsonschema:"title=Type"`
+	// Type of fuel ("c_ClaveTipoCombustible" codes).
+	FuelType cbc.Code `json:"type,omitempty" jsonschema:"title=Type"`
 	// Name of the fuel
-	Name string `json:"name" jsonschema:"title=Name"`
-	// Base price of a single unit of the fuel
+	FuelName string `json:"name" jsonschema:"title=Name"`
+	// Base price of a single unit of the fuel.
 	Price num.Amount `json:"price" jsonschema:"title=Price"`
+	// Identifier of the purchase ("Folio").
+	PurchaseCode cbc.Code `json:"purchase_code" jsonschema:"title=Purchase Code"`
+	// Result of quantity multiplied by the item's price (calculated).
+	Total num.Amount `json:"total" jsonschema:"title=Total" jsonschema_extras:"calculated=true"`
+	// Map of taxes applied to the purchase.
+	Taxes tax.Set `json:"taxes" jsonschema:"title=Taxes"`
 }
 
 // FuelTotals contains the summaries of all calculations for the fuel purchases.
 type FuelTotals struct {
-	// Sum of all line sums
+	// Sum of all line sums.
 	Total num.Amount `json:"total" jsonschema:"title=Total"`
 	// Grand total after taxes have been applied.
 	TotalWithTax num.Amount `json:"total_with_tax" jsonschema:"title=Total with Tax"`