Added agency Reports

Author: schnuerle

agency/README.md

@@ -24,7 +24,8 @@ This specification contains a collection of RESTful APIs used to specify the dig
   * [Stops - Register](#stops---register)
   * [Stops - Update](#stops---update)
   * [Stops - Readback](#stops---readback)
-* [Reports](#Reports)
+* [Reports](#reports)
+  * [Reports - Register](#reports---register)
 
 ## General information
 
@@ -287,6 +288,40 @@ If `stop_id` is specified, `GET` will return an array with a single stop record,
 
 [Top][toc]
 
+## Reports
+
+Reports are information that providers can send back to agencies containing aggregated data that is not contained within other MDS endpoints, like counts of special groups of riders. These supplemental reports are not a substitute for other MDS Provider endpoints.
+
+The authenticated reports are monthly, historic flat files that may be pre-generated by the provider. 
+
+[Top][toc]
+
+## Reports - register
+
+The `/reports` endpoint allows an agency to register aggregated report counts in CSV structure.
+
+**Endpoint:** `/reports`  
+**Method:** `POST`  
+**Payload**: A CSV of [Reports][reports]
+
+200 Success Response:
+
+See [Bulk Responses](#bulk-responses)
+
+#### Reports Register Errors:
+
+| `error`              | `error_description`                               | `error_details`[]               |
+| -------------------- | ------------------------------------------------- | ------------------------------- |
+| `bad_param`          | A validation error occurred                       | Array of parameters with errors |
+| `missing_param`      | A required parameter is missing                   | Array of missing parameters     |
+| `already_registered` | A stop with `stop_id` is already registered       |                                 |
+
+403 Unauthorized Response:
+
+**None**
+
+[Top][toc]
+
 [accessibility-options]: /general-information.md#accessibility-options
 [beta]: /general-information.md#beta-features
 [bulk-responses]: /general-information.md#bulk-responses
@@ -295,15 +330,16 @@ If `stop_id` is specified, `GET` will return an array with a single stop record,
 [error-messages]: /general-information.md#error-messages
 [hdop]: https://en.wikipedia.org/wiki/Dilution_of_precision_(navigation)
 [modes]: /modes/README.md
-[propulsion-types]: /general-information.md#propulsion-types
+[propulsion-types]: /data_types.md#propulsion-types
+[reports]: /data_types.md#reports
 [responses]: /general-information.md#responses
-[stops]: /general-information.md#stops
-[telemetry-data]: /general-information.md#telemetry-data
-[trip-data]: /general-information.md#trips
+[stops]: /data_types.md#stops
+[telemetry-data]: /data_types.md#telemetry
+[trip-data]: /data_types.md#trips
 [toc]: #table-of-contents
 [ts]: /general-information.md#timestamps
 [vehicle]: /data-types.md#vehicles
-[vehicle-types]: /general-information.md#vehicle-types
+[vehicle-types]: /data_types.md#vehicle-types
 [vehicle-states]: /modes/vehicle_states.md
 [vehicle-event-types]: /modes/event_types.md
 [vehicle-event]: /data-types.md#events