[Dayrion]

Set a timer with a variable ? Like :

PHP код:

/* At the top of the script */
new Bool:allowedRepair[MAX_PLAYERS];
//------------------------------------------------------------------------------------------------
/* In your command */
    if(!allowedRepair[playerid]) return SendClientMessage(playerid, X11_MEDIUM_ORCHID_3, "You can't repair this vehicle. You have to wait 1 minute!");
    /* If the player can repair the vehicle, set this after RepairVehicle(vehicleid) */
    allowedRepair[playerid] = false;
    SetTimerEx("timerAllowedRepair", 60000, false, "i", playerid);
    /* End of the command */
//------------------------------------------------------------------------------------------------
/* Timer allowed repair a vehicle : */
forward timerAllowedRepair(playerid);
public timerAllowedRepair(playerid)
{
    allowedRepair[playerid] = true;
    SendClientMessage(playerid, X11_MEDIUM_ORCHID_3, "You can repair vehicles");
    return 1;
} 


If you need some explications, say it. I don't think it's the best way to do what you want. :$

EDIT : Alright, they too fast for me. Wow.