diff --git a/src/main/java/io/github/hectorvent/floci/services/acm/AcmJsonHandler.java b/src/main/java/io/github/hectorvent/floci/services/acm/AcmJsonHandler.java
index 8008ef7..43ebd05 100644
--- a/src/main/java/io/github/hectorvent/floci/services/acm/AcmJsonHandler.java
+++ b/src/main/java/io/github/hectorvent/floci/services/acm/AcmJsonHandler.java
@@ -563,8 +563,10 @@ public class AcmJsonHandler {
 
     private CertificateOptions parseOptions(JsonNode optionsNode) {
         if (optionsNode.isMissingNode()) return null;
-        String ctPref = optionsNode.path("CertificateTransparencyLoggingPreference").asText("ENABLED");
-        return new CertificateOptions(ctPref, "DISABLED");
+        String ctPref = parseOptionValue(optionsNode, "CertificateTransparencyLoggingPreference");
+        String export = parseOptionValue(optionsNode, "Export");
+        // An exportable public certificate is requested with Export ENABLED, and keeps it for life.
+        return new CertificateOptions(ctPref != null ? ctPref : "ENABLED", export != null ? export : "DISABLED");
     }
 
     private List<CertificateStatus> parseCertificateStatuses(JsonNode node) {
diff --git a/src/test/java/io/github/hectorvent/floci/services/acm/AcmExportableRequestTest.java b/src/test/java/io/github/hectorvent/floci/services/acm/AcmExportableRequestTest.java
new file mode 100644
index 0000000..b4b13d1
--- /dev/null
+++ b/src/test/java/io/github/hectorvent/floci/services/acm/AcmExportableRequestTest.java
@@ -0,0 +1,70 @@
+package io.github.hectorvent.floci.services.acm;
+
+import io.github.hectorvent.floci.testing.RestAssuredJsonUtils;
+import io.quarkus.test.junit.QuarkusTest;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static io.restassured.RestAssured.given;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.notNullValue;
+
+@QuarkusTest
+class AcmExportableRequestTest {
+
+    private static final String ACM_CONTENT_TYPE = "application/x-amz-json-1.1";
+
+    @BeforeAll
+    static void configureRestAssured() {
+        RestAssuredJsonUtils.configureAwsContentTypes();
+    }
+
+    @Test
+    void requestCertificateKeepsTheExportOption() {
+        String exportable = request("{\"DomainName\":\"exportable.example.com\",\"Options\":{\"Export\":\"ENABLED\"}}");
+
+        call("DescribeCertificate", "{\"CertificateArn\":\"" + exportable + "\"}")
+            .statusCode(200)
+            .body("Certificate.Options.Export", equalTo("ENABLED"))
+            .body("Certificate.Options.CertificateTransparencyLoggingPreference", equalTo("ENABLED"));
+
+        call("ExportCertificate", "{\"CertificateArn\":\"" + exportable + "\",\"Passphrase\":\"c2VjcmV0\"}")
+            .statusCode(200)
+            .body("PrivateKey", notNullValue());
+    }
+
+    @Test
+    void requestCertificateWithoutExportIsNotExportable() {
+        String plain = request("{\"DomainName\":\"plain.example.com\",\"Options\":{\"CertificateTransparencyLoggingPreference\":\"DISABLED\"}}");
+
+        call("DescribeCertificate", "{\"CertificateArn\":\"" + plain + "\"}")
+            .statusCode(200)
+            .body("Certificate.Options.Export", equalTo("DISABLED"))
+            .body("Certificate.Options.CertificateTransparencyLoggingPreference", equalTo("DISABLED"));
+
+        call("ExportCertificate", "{\"CertificateArn\":\"" + plain + "\",\"Passphrase\":\"c2VjcmV0\"}")
+            .statusCode(400)
+            .body("__type", equalTo("ValidationException"));
+    }
+
+    @Test
+    void requestCertificateRejectsAnUnknownExportValue() {
+        call("RequestCertificate", "{\"DomainName\":\"bad.example.com\",\"Options\":{\"Export\":\"MAYBE\"}}")
+            .statusCode(400)
+            .body("__type", equalTo("ValidationException"));
+    }
+
+    private String request(String body) {
+        return call("RequestCertificate", body).statusCode(200).extract().jsonPath().getString("CertificateArn");
+    }
+
+    private io.restassured.response.ValidatableResponse call(String action, String body) {
+        return given()
+            .header("X-Amz-Target", "CertificateManager." + action)
+            .contentType(ACM_CONTENT_TYPE)
+            .body(body)
+        .when()
+            .post("/")
+        .then();
+    }
+}