[Cameltoe]

Make a variable like this:

Код:

IsBusJob[MAX_PLAYERS];

Then on OnPlayerKeyStateChange:

Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
	if (newkeys==KEY_SUBMISSION && IsBusJob[playerid] == 0 && veh == bus1) // checks if Submission key is pressed + if the player is already working + that the player is in a bus
	{
	  SendClientMessage(playerid, green, "You started working for the bus company!"); // SCM only one time cause the variable under here.
	  IsBusJob[playerid] = 1; // here's the variable set to 1, this will prevent the player from starting working over again.
	}

- It's not a full code, it is for you so you can read and understand it then go ahead and code it yourself!